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The $249 Foc.us device shoots an electrical current into the brain – boosting one’s cognitive abilities. Sounds like science fiction? It’s not — transcranial Direct Current Stimulation (tDCS) received funding from both the US government and its claims come backed by growing stacks of scientific research.

Even the Department of Defense threw money at various tDCS research projects. Cashing in on the tDCS craze, the Foc.us device targets the prefrontal cortex, which is associated with focus and attention. In theory, the Foc.us should improve users’ attention spans. While the manufacturer bills the device as a starter kit for those interested in tDCS, it could prove useful for a wider audience, including students, gamers and others. So does the Foc.us work and is it worth the money?

The Science and the Controversy

tDCS – on the surface – can provide cognitive enhancement and medical treatment. Studies show that methods similar to tDCS might treat memory loss in the elderly, depression and other neurological disorders. Other research indicate that tDCS can boost learning and other cognitive abilities. While some studies support the efficacy of applying electrical stimulation to the brain, the studies don’t cover the long-term effects. However, the short-term consequences appear benign. Some users reported temporary blindness, aggression and more. To my knowledge, no users reported death or injury. However, those suffering from seizures or epilepsy: DO NOT USE tDCS! It could potentially trigger a seizure!

tDCS DIY kits cost mere dollars – which could explain the calls from politicians to regulate tDCS technology. Regulation would, in effect, keep the technology out of the hands of the masses. Despite impending regulation, a growing tDCS community exists, notably on Reddit.

Aesthetics and Design

The majority of consumer tDCS devices appear much like home-brewed kits, cobbled together from spare parts from Radioshack. The lack of aesthetic polish may give many potential users pause. Departing from its brethren, the Foc.us fuses together aesthetic appeal with ease-of-use. It features a black, hard-plastic build, along with rubber grips. It’s semi-rigid, offering a degree of flexibility – it’s barely flexible enough to fit on one’s head.

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Comfort and Fit

On the downside, the unit doesn’t accommodate larger heads very well. I found that the Foc.us’s internal electrodes wouldn’t make proper contact with my forehead – and its placement didn’t quite line up with the zones that the manufacturer intended the device to target. Also, the first few seconds of wearing the device causes a slight burning sensation. If the Foc.us’s electrodes make a secure fit, this sensation will vanish within a minute. If poorly fitted, the burning will continue, as the current will possess a narrower pathway — potentially causing skin irritation or even very minor burns.

2014-08-25_09h52_18

Specifications and Features

  • Automatic shut-off
  • Bluetooth 4.0
  • Current ranges between 0.8 mA and 2.0 mA
  • External electrode support
  • Internal vibrating motor

Package Contents

  • Foc.us headband
  • microUSB cable
  • 8 sponges
  • Dripper bottle
  • Instruction manual
  • Carrying case

Getting Started

The initial configuration process of the Foc.us headband requires just a few simple steps.

  • First, charge the device using the micro-USB cable.
  • Second, moisten both sides of four sponges with a saline solution (or water) and insert them into the Foc.us device, near the copper plates. There are four, circular containers which will hold the sponges.
  • Third,  flip the power button from “W” to “O” – thereby putting it into standby mode — and then holding the capacitive button for three seconds. The Foc.us will then vibrate, and the Foc.us logo will flash blue, indicating it can initiate a Bluetooth pairing.
  • Finally, position the Foc.us device on one’s head, using the instructions above. Make sure that all four sponges make solid contact with your forehead. If they don’t, the device will not operate or will malfunction.
  • Optionally, the Foc.us offers a Bluetooth pairing mode. The Bluetooth pairing process requires an Android device with – at the very least – KitKat (4.4). The Foc.us app allows the user to enter various modes, while stimulate the brain in different ways. It also allows for firmware upgrades and several kinds of brain stimulation patterns. The purpose of these patterns isn’t very clear – nothing in the instruction manual explains them.

focus android app

Making Use of the Foc.us Headband

As billed by the makers of Foc.us, the device purportedly aids attention span and focus. Its primary use boosts gaming ability – users should manage to score significantly higher on focus-oriented tasks. While the manufacturer states that the Foc.us is intended for gaming, I instead substituted a reaction time benchmark. Additionally, users can use external electrodes, not included with the Foc.us. These allow users to target areas of the brain associated with other cognitive processes. However, I will not cover this features and the Foc.us does not include external electrodes.

The Benchmark

Because gaming performance (particularly on modern games, which lack scores) lacks hardcore testable data, I used the “Simon Effect” reaction time benchmark to determine whether or not my reflexes and focus actually improved. The Simon Effect (here’s the diagnostic test itself) displays either a left or right arrow – the user attempts to hit a corresponding keyboard key in response. The faster the user hits the button, the better the response time.

My methodology is flawed. I tested two weeks before reattempting, wearing the Foc.us device, in order to minimize the effect of learning. Even so, other elements, such as time of day, sleep the night before, etc. could have dramatically thrown my results off. Don’t assume my results approach a scientific standard. They don’t.

Pre-Foc.us Results

As you can see (from the chart below), my initial results were spectacularly awful (I was one of the worst ever tested). While my average “correct” responses were well below the average response time, my prodigious error rate exceeded the average.

With Foc.us Results

My reaction time skyrocketed, while the error rate collapsed. These numbers indicate that some kind of cognitive augmentation occurred. I can’t confidently attribute the improvement to the Foc.us, but the spike in improvement could (in part) be due to the Foc.us. My initial results are displayed in the upper-right hand side of the graph, in the red box. My results after using the Foc.us are indicated by the red square in the lower-left hand side of the graph. Both response time and accuracy increased.

simon response time test

Downside

  • Skin Irritation: After several minutes of use, I experienced a small degree of skin irritation. If the sponges don’t make solid contact with one’s skin, the Foc.us begins increasing voltage – this can cause skin irritation as well as visual artifacts, such as flashes of light. tDCS can even cause loss of consciousness or even blindness.
  • Burning: The Foc.us ramps up amperage when it detects resistance; for example, if the sponges don’t make complete contact with the user’s skin.
  • Phosphenes: Users may experience visual “artifacts” called phosphenes – bright flashes of light. Some researchers theorize that is the way our brain automatically compensates for voltage changes.
  • Poor documentation: Foc.us’s developers failed to include a lot of necessary documentation. See below for additional details.
  • Questionable Safety: While tDCS, so far, has proven safe, the Foc.us has a potentially deal-breaking tendency to ramp up voltage when it senses high resistance or poor electrode-to-skin contact. This may cause greater amounts of skin irritation than other tDCS devices and/or greater amount of phosphene creation — among other potential risks.
  • Aggression: I have read anecdotal accounts that the Foc.us can increase aggression after prolonged periods of use. I’ve been using it daily for three weeks and have yet to experience these symptoms. Readers should pay careful attention that the brain portions stimulated by the Foc.us are UNTESTED by studies. As such, there are likely unknown consequences of using it.

Maintenance

For those interested in purchasing the Foc.us, you’ll need to know two basic means of replacing electrodes, how to properly fit the Foc.us device and a bit about oxidation.

Replacing Electrodes

After a fair amount of use, the electrodes (sponges) on the Foc.us will require replacement. You will notice that they won’t absorb liquid or will display signs of absorbing copper carbonate – the oxidative compound that forms on the copper contacts. Just cut disks from a house-hold sponge and use in place of the electrodes.

Oxidation

To avoid oxidation of the copper contacts on the Foc.us, consider using water or electro-conductive gel instead of saline solution. You can also use external electrodes. I used saline, but it almost immediate caused greenish oxidation on cathode copper contacts. Oxidation is normal, but the formation of copper carbonate is increased by use of saline. I see no easy way of replacing the internal copper electrode contacts, so device longevity remains in question.

Conclusion

Transcranial Direct Current Stimulation works. It’s hard not being impressed with the Foc.us’s elegant design, ease-of-use and flexibility. Unfortunately, the Foc.us doesn’t quite meet muster. While it offers a slick, easy-to-use design, an excellent app and more – the $249 price-tag combined with a lack of safety features make it a poor sale to those seeking to dip their toes into tDCS. Had the device included proper safety features I would recommend the Foc.us – but this single, bizarre omission should make any potential buyer balk.

MakeUseOf recommends: Don’t buy it. The Foc.us may work, but its lack of safety features and high cost make it a too risky for casual users to try – the risk posed by a device that increases voltage relative to resistance could prove disastrous. If you possess familiarity with the technology, try a more expensive device. If you possess experience wiring and building electronics, consider building your own.

How Do I Win The Foc.us tDCS Headset?

Foc.us tDCS Headset

For mobile users, click here to enter.

The winner will be selected at random and informed via email. View the list of winners here.

Send your products to be reviewed. Contact Jackson Chung for further details.

  1. Michael
    February 19, 2016 at 8:58 pm

    Buyer Beware! They will not honor their return policy. I battled them for months after following their policy to the letter. They gave me an RMA and had me send the device back to them, then they stopped returning emails! I had to dispute the charge with my credit card company to get my money back! This product is a scam and their customer service reflects that.

    • Kannon Yamada
      February 19, 2016 at 9:10 pm

      It's a strange situation. I had a unit fail and they replaced it without even requesting that I fill out an RMA. They even shipped it to me with expedited delivery and didn't even request that I return the broken unit.

      But I've read similar complaints as yours. It seems that they are not doing very well.

  2. João Batista
    November 7, 2014 at 12:40 pm

    Gostaria muito de experimentar.

  3. Anna Marie M.
    October 18, 2014 at 4:06 pm

    I will be able to see if it really works if I am able to try it. To see is to believe.

  4. raymond crisostomo
    October 18, 2014 at 1:09 pm

    i think its worth a try

  5. Rica
    October 18, 2014 at 11:15 am

    i want to try

  6. heather c
    October 18, 2014 at 3:11 am

    I would love to try it! Just learning about this is pretty cool...and a little science-fictiony.

  7. Stacie Clark
    October 17, 2014 at 11:33 am

    To be perfectly honest, I'm skeptical. I don't know that I would buy this device but I would be willing to try it if I happened upon one at no charge ... :)

  8. mark andro tejada
    October 16, 2014 at 4:36 pm

    Yes it would! I would love to try it!

  9. arjayssa eryes
    October 16, 2014 at 4:34 pm

    Yes, it would work even though it looks different from the standard headsets. I love to try it!

  10. Zak Laughton
    October 16, 2014 at 10:19 am

    I do believe Foc.us really works, and I'd love to try it!

  11. cylina williams
    October 15, 2014 at 4:07 pm

    I am sure it works but maybe not exactly as descibed

  12. Tiffani
    October 15, 2014 at 11:47 am

    Darn, I thought it unlocked the other 90% of our brains we don't use...:(

  13. Kelly
    October 14, 2014 at 11:56 am

    I am sceptical, however I had have electrical impluses and treatment with acupuncture for muscle issues and it has works wonders so I do think there is a possibility.
    I would want a cousin of mine who loves all of this sort of stuff to try it first before I would have a go.

  14. Anita
    October 13, 2014 at 2:44 am

    I'm not sure that it really works, but I would like to try it out. I'm kind of concerned though about the precaution for seizure activity people to not use it. What other kind of side effects could it have?

  15. Tim Marshall
    October 13, 2014 at 12:47 am

    I have an autoimmune disease that has taken my previously sharp cognitive function, Im trying to retrain now but currently am at home, cant drive ,read (books), do games,music etc due to sensory overload, this product intrigues me especially as a friend with the same condition had the technology (though not this specific brand of device) recommended as a viable treatment

  16. Raja
    October 11, 2014 at 5:30 pm

    yes it should work

  17. Monika
    October 11, 2014 at 5:29 pm

    yes i really wanna try this
    i should work

  18. Gülbahar D.
    October 8, 2014 at 7:11 pm

    Need to try first.

  19. Gökhan G.
    October 8, 2014 at 7:11 pm

    I'd like to try.

  20. mica jannele
    October 7, 2014 at 1:49 pm

    yes sure. :)

  21. Adly Asraf
    October 7, 2014 at 5:02 am

    Not really sure but I love to try it.

  22. Bill
    October 6, 2014 at 8:19 pm

    sure - send it to me and I'll test it for you

  23. Sergio Rizzi
    October 5, 2014 at 1:35 pm

    I would love to try it!

  24. Theo
    October 4, 2014 at 7:49 pm

    The focus may or may not work, it is always worth a try

  25. Gord
    October 4, 2014 at 6:53 am

    I don't know if it works or not. However I would give it a try.

  26. Alan Tong
    October 4, 2014 at 2:08 am

    I have my hopes up that it really does work. I would definitely try it just to see what it is like firsthand. Thanks for the review!

  27. Tonya Tipton
    October 4, 2014 at 12:55 am

    I believe Foc.us really works and yes it is something I would love to try.

  28. João Miguel
    October 4, 2014 at 12:22 am

    Maybe it works, but I need (and would like) to try it..

  29. z
    October 3, 2014 at 4:21 pm

    Hahaha... I love how the review says "don't buy this" for multiple reasons.... but enter to win this possibly dangerous device for free!
    Did anyone else think it's kind of strange to have a giveaway for a product that is not recommended?

    • Kannon Yamada
      October 4, 2014 at 4:54 pm

      Z, thanks for the comment. I am something of a hypocrite for writing this review and then giving it away. It encourages people to use a device with questionable safety characteristics.

      It's my hope that those considering a purchase look elsewhere. Those who win the device should use it responsibly or not at all. I have used this thing every day for over a month. It hasn't fried my brain yet, but perhaps it has fried my ability to comprehend ethics.

  30. Deborah J
    October 3, 2014 at 1:06 pm

    yes & yes

  31. Paige Yang
    October 3, 2014 at 8:15 am

    Yes please, really love to give it a go!

  32. Peter H
    October 3, 2014 at 12:51 am

    Its just business.

  33. Julian
    October 2, 2014 at 9:50 pm

    This reminds of of a commercial with a lady trying new things and getting shocked. This thing is kind of scary. I LIKE! lol

  34. Catherine McCrum
    October 2, 2014 at 8:50 pm

    My goodness, do I ever need to try this. Both for myself and some friends with dementia.

    • Kannon
      October 2, 2014 at 10:32 pm

      Hey Catherine, there's actually treatments from medically licensed devices using tDCS and similar methods. I would check there before considering something like the Foc.us. The Foc.us isn't ready for mainstream use.

  35. Bogdan
    October 2, 2014 at 8:21 pm

    Ofcourse!!!

  36. Denis K
    October 2, 2014 at 5:10 pm

    maybe works

  37. Nitin Hassija
    October 2, 2014 at 3:53 pm

    Not sure if it would do what it say it does. I don't mind giving it a try.

  38. Daniel Velez
    October 2, 2014 at 2:09 pm

    I am curious if it would actually benefit you in a FPS game, and I would be very interested to trying it out.

  39. Jesse
    October 2, 2014 at 1:44 pm

    It couldn't make me any dummer so I'd be willing to try it

  40. Chris Osborne
    October 2, 2014 at 11:34 am

    Sounds a treat. I'd give it a go

  41. Andreia
    October 2, 2014 at 11:16 am

    I really doubt this totallly works like it doesn't feel safe at all :
    Anyway it's a cool gadget and we should wait for an improved version of it and then I would try it on =D

  42. Deepak Singh Jadon
    October 2, 2014 at 9:03 am

    I want This

  43. Larry Banamassa
    October 2, 2014 at 8:39 am

    Hell, I'll give it a try!

  44. b00ker
    October 2, 2014 at 8:01 am

    maybe works. like 2 try

  45. Junil M
    October 2, 2014 at 7:20 am

    Looks great

  46. Boris Gorozhankin
    October 2, 2014 at 7:12 am

    Well, who knows, it might, and I'd certainly like to try!

  47. Adhar
    October 2, 2014 at 6:58 am

    That's something! Would definitely try it.

  48. Prabhath Kaushalya
    October 2, 2014 at 6:48 am

    I really want to try this!

  49. jayjay
    October 2, 2014 at 5:43 am

    never try never know. I wish to try. no harm done right?

  50. Jack
    October 2, 2014 at 5:05 am

    I'd try it, don't know if it works as claimed but would try it.

  51. Juan Valdivia
    October 2, 2014 at 4:30 am

    Done!!! I hope to win!!!

  52. Asriel Rusdyawan
    October 2, 2014 at 4:30 am

    I believe When people are going crazy for something new and unique. I bet this stuf would become so much success.

  53. Endracion
    October 2, 2014 at 4:08 am

    I've yet to be convinced, but I don't think it's impossible.

  54. Dewa Arga Candra
    October 2, 2014 at 3:40 am

    i know it's work
    but the design
    err...
    weird

  55. glen
    October 2, 2014 at 3:21 am

    This looks interesting!

  56. Bruno
    October 2, 2014 at 2:35 am

    Would take the risks and try it :)

  57. Esperanza Gailliard
    October 2, 2014 at 2:13 am

    Yes I believe it works and would definitely like to try it out!

  58. Penni
    October 2, 2014 at 2:09 am

    I'm not sure whether this works or not, but I'd definitely like to try it!

  59. Roz
    October 2, 2014 at 1:39 am

    This sounds very interesting and yes I would definitely like to try it.

  60. Marco L
    October 2, 2014 at 1:30 am

    I'm scared after I read the review but would try it perhaps

  61. Karla Sceviour
    October 2, 2014 at 1:15 am

    I`m not sure if it would work,,I would love to try it though.

  62. Amie George
    October 2, 2014 at 1:08 am

    I would seriously LOVE to try this... Interesting stuff

  63. Nadine
    October 2, 2014 at 1:06 am

    I would love to try this out!

  64. Andrew Halliwell
    October 2, 2014 at 12:13 am

    probably works but it might be a bit variable between people
    some it might work incredibly well, others... not so much.

  65. Candice M
    October 2, 2014 at 12:09 am

    It looks interesting, I might try it.

  66. Jay
    October 2, 2014 at 12:08 am

    I am both intrigued and scared to use this.

  67. Juan Camargo
    October 1, 2014 at 11:29 pm

    I really want to try this! Sounds like a magic device.

  68. William B.
    October 1, 2014 at 10:56 pm

    I am using a similar product called the FISHER WALLACE STIMULATOR. It uses a headband to hold two electrodes on the head,and has various settings for treating insomnia (which I suffer from),depression and pain.

    • Kannon Yamada
      October 4, 2014 at 7:08 pm

      Thanks for telling us about the FWS. I'll have to look into it.

  69. Stephen Almberg
    October 1, 2014 at 10:46 pm

    I'd like to try it!!

  70. Mickey Meador
    October 1, 2014 at 10:44 pm

    SciFi is full of alien abductions and implant mind control and now the UberLibs are actually working with government money to accomplish it now. Big Brother will require everyone to wear one in the near future. Assimilate! We are Borg!

  71. Robyn Moore
    October 1, 2014 at 10:23 pm

    I don't know if I believe this but I would love to try it!

  72. Nathan Lapointe
    October 1, 2014 at 10:17 pm

    I'd need to read more about the technology, but I'd love to try it!

  73. Ryan
    October 1, 2014 at 10:10 pm

    I would love to try it.

  74. Sam Kar
    October 1, 2014 at 9:59 pm

    Yes, I would like to try it out. Looks Cool!

  75. Melanie Westermann
    October 1, 2014 at 9:45 pm

    It´s hard to believe it really works. Need to try it!

  76. Hanadia Roby
    October 1, 2014 at 9:43 pm

    yes and yes!

  77. Theresa A
    October 1, 2014 at 9:01 pm

    I would be very interested in trying it, just to see if it does indeed work. :)

  78. steven weber
    October 1, 2014 at 8:54 pm

    hmm.. good question, I would have to try it first before I could say if it really works or not.

  79. Anita
    October 1, 2014 at 8:54 pm

    I'm not sure about the technology,but I am extremely intrigued to find out.thanks for showing this.

  80. Edmond
    October 1, 2014 at 8:51 pm

    OMG, great review. Wow, Wow, is fab. & splendid. 2 fingers snap. It is tight, fly & off the chain. Thank you for the awesomeness, the contest, and generosity. Dear Santa: I’ve been nice. My X-Mas wish this year is to win this contest is fab. & splendid. 2 fingers snap. It is tight, fly & off the chain. Thank you for the awesomeness, the contest, and generosity. Dear Santa: I’ve been nice. My X-Mas wish this year is to win this contest

  81. dirk moser
    October 1, 2014 at 8:45 pm

    no and yes

  82. Cre8tive
    October 1, 2014 at 7:58 pm

    This just might work. Let me try it.

  83. Gaurav Bhargava
    October 1, 2014 at 7:57 pm

    Would love to try it.

  84. Rikard
    October 1, 2014 at 6:20 pm

    Pure water will only work if you produce a lot of sweat folks.

    • Kannon Yamada
      October 4, 2014 at 7:10 pm

      :-) Thanks Rikard!

      Water from the tap does work (Foc.us and other tDCS site suggest it), but obviously salt water is a better conductor of electricity.

      De-ionized water wouldn't work very well, as you pointed out.

  85. jarvis
    October 1, 2014 at 5:52 pm

    great

  86. Youssef Azza
    October 1, 2014 at 5:42 pm

    Indeed i guess that the Foc.us really works

  87. KaushikMedhi
    October 1, 2014 at 4:09 pm

    Amazing Device ! Never seen such type of weird headset in reality !

  88. Sam
    October 1, 2014 at 4:07 pm

    As someone with an atrocious memory, the idea sounds great but the complete lack of safety and worrying side-effects is enough to put me off this particular device. However, if a safer version becomes available, I'd love to try it.

  89. Steve AD
    October 1, 2014 at 3:41 pm

    If you want a decent device, check out: trans-cranial.com/tct/end-users-patients/tdcs-stimulator-products/

  90. Ed
    October 1, 2014 at 3:29 pm

    Hope to win so I can check it out and give a review.

  91. Scott
    October 1, 2014 at 3:26 pm

    I would love to try this. If it works, fantastic! If I win it free, and it doesn't work, then I'm not out anything.

  92. Mesut Yaver
    October 1, 2014 at 3:10 pm

    I think wearable smart gadgets like this will make life easier.

  93. Angelo V.
    October 1, 2014 at 2:44 pm

    I'd like to see if it works first hand. So I want it.

  94. Rebecca P
    October 1, 2014 at 11:30 am

    Why are you calling it a Shield Tablet, Dave?

  95. Rebecca P
    October 1, 2014 at 11:30 am

    Why are you calling it a Shield Tablet, Dave?

  96. Daniel R
    October 1, 2014 at 6:31 am

    i dont know what ask. Great Review!

  97. Francesco Fiorino
    October 1, 2014 at 6:16 am

    How last the electrods?

    • Kannon Yamada
      October 4, 2014 at 7:12 pm

      I've been using the sponge electrodes for about 10 minutes a day for 2 months. I squeeze them out after using them and rehydrate using tap water. they haven't worn out yet, but they don't look good at all.

  98. Evilplankton
    October 1, 2014 at 4:34 am

    I can haz cyborg! I had no idea this was so awesome, thanks for the detailed article and for using your own precious brain as a test.

  99. Tate S
    October 1, 2014 at 3:25 am

    Does it feel weird when wearing it on your head?

    • Kannon Yamada
      October 4, 2014 at 7:13 pm

      Oh yes. It's bizarre. After the tingling subsides, it won't even really feel like anything is there.

  100. Magnolia B
    October 1, 2014 at 2:12 am

    Is there a recommended minimum age?

  101. Edward S.
    October 1, 2014 at 1:28 am

    The side effects seem to many to me to think about using these at this point. I wonder when some of these issues will be addressed.

  102. Antonio I
    September 30, 2014 at 10:32 pm

    very interesting and scaring technology!

  103. B Kautz
    September 30, 2014 at 9:38 pm

    How high can the electricity be turned up to, this might be good for some of my "experiments"

  104. Gary W
    September 30, 2014 at 9:17 pm

    It's amazing that new breakthrough medications have to be tested for years before the general public can be allowed to use them when any clown can produce something like this.

  105. ??????? ?
    September 30, 2014 at 8:50 pm

    What with battery?

    • Kannon Yamada
      October 4, 2014 at 7:14 pm

      It has a very long battery life. I believe it's a 9V li-ion battery. i get about two weeks or so of about ten minutes of use per day out of it. The entire reason they used a battery, instead of making it a plug-in device, is for safety purposes.

  106. Philip Austin
    September 30, 2014 at 7:38 pm

    I Really Dont Want To Know Anymore More

    Because Nothing Frightens Me More - Than Wearable Tech

    Hello 1984

  107. Andrew L
    September 30, 2014 at 7:03 pm

    What does this look like when someone is wearing it?

    • Kannon Yamada
      October 4, 2014 at 7:15 pm

      There's a cartoon of what it looks like in the article. You can go to the main website to see what someone looks like while wearing it.

      It's obviously not designed for fashion.

    • Andrew L
      October 5, 2014 at 1:11 am

      I was curious about what it looked like on real people, so I checked their Web site. Thanks!

  108. Eric R
    September 30, 2014 at 6:01 pm

    Wanted me to comment about the shield tablet guess someone did not change the form

  109. ptrix
    September 30, 2014 at 5:27 pm

    interesting device. how long can you wear it until it becomes uncomfortable or until you forget that you're wearing it?

    • Kannon Yamada
      October 4, 2014 at 7:16 pm

      I wouldn't use this thing for more than 10 minutes per day. I adjusted the amperage down to 1.5. It causes almost no skin irritation at this setting, with the proper amount of saline/water applied.

  110. Dany B
    September 30, 2014 at 3:44 pm

    More details on specs would be great.

  111. Nicolas D
    September 30, 2014 at 1:49 pm

    Looks cool, I just think the skin irritation can be annoying if you use it for a whole day..

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