Go Flow 4 tDCS Brain Stimulator


In stock

(20 customer reviews)

Foc.us Go Flow 4 – the Most Powerful, tDCS Available Anywhere.
NEW: Includes 0.75Hz sotDCS mode – slow oscillating transcranial Direct Current Stimulation.
Now shipping!

4mA max-tDCS and 0.75Hz so-tDCS modes.

<35 minute timer, comfort ramping, realtime current display

Everything you need – stimulator, battery, electrodes, sponges, magnetic cable, travel case, instructions.

The smallest tDCS stimulator in the world is also the most powerful with upto 4mA of double-isolated tDCS goodness.

Now also includes slow oscillating tDCS mode as BONUS feature.

Go Flow 4 tDCS Brain Stimulator


In stock

Go Flow 4 includes:

  • Go Flow Stimulator
  • 9v Battery
  • Headband
  • 4 x Amxy Electrodes
  • 4 x Electrode Sponges
  • Magentic x/y cable
  • Dual x/y magnetic cable
  • Travel Case
  • Instruction booklet
  • Saline bottle

What's Included

  • Go Flow 4
  • Foc.us Headband
  • Foc.us 9V battery
  • x/y magnetic cables
  • 4 x amx-y silicone electrodes
  • 4 x sponges
  • Water bottle
  • Carry case (red)

Stimulation Modes

  • tDCS
  • sotDCS 0.75Hz 


  • 7 LED accu-gauge
  • Green = duration
  • Red/Amber = current

Battery and Power

  • We recommend leaving Go Flow 4 connected to battery

    Battery life up to 8,000 sessions.

    • Battery type: Ultra alkaline
    • Non-rechargable


  • Current: 1.0, 1.5, 2.0, 3.0, 3.5, 4.0mA (±0.25mA during session)
  • 5, 10, 15, 20, 25, 30, 35 minute duration timer


Store all Go Flow components in the case when not in use. Sponges should be squeezed dry and will reshape when next wet.

Materials Used

The Foc.us headband is made of a soft, synthetic poyester. The amx-y electrodes are made from skin-safe FDA approved silicone. 

The carry case is made from animal friendly fake leather.

Environmental Requirements

  • Operating temperature: 0° to 70° C
  • Maximum operating altitude: 50,000ft


Go Flow 4 has 4mA – double the power of other tDCS stimulators. With great power comes great responsibility. You must monitor yourself during DIY-tDCS and end the session or reduce the current if any adverse short-term negative effects.

take chargetm

The most powerful tDCS stimulator is also the smallest. Take charge anywhere, anytime.

Digital Operation

1. Press to turn on 2. Press to set current 3. Press to start session.

No App Required

Go Flow i

4mA tDCS

Controlled tDCS sessions from 1.0mA to 4mA in 0.25mA increments.

0.75Hz sotDCS

slow-oscillating transcranial Direct Current Stimulation at 0.75Hz in sotDCS mode.

Sleep Spindles

sotDCS has been shown to increase the power and duration of slow-wave spindles during sleep.

Sports Montages

Supports all known sports stimulation montages and ships with 4 electrodes for multi-focal capabilities.


The most accurate current control circuitry on the planet. Dual current over-lock safety systems. The cleanest tDCS signal possible.

Comfort Control

Change the current up or down during an active session. Automatic ramping on session start and stop.

Compare foc.us Brain Stimulators

Max current mA

4.0 mA

2.1 mA

Maximum voltage


Configurable 15V to 65V

Stimulation Modes




27mm x 27mm x 12mm

60mm x 28mm x 9mm


9V Dry Alkaline PPV9

Internal rechargable LiPo 3.7V



Bluetooth Low Energy





3 way rocker switch
UP increase
DOWN decrease
PRESS confirm

5 way joystick
On-screen navigation UI

App control iOS & Android

Included Programs


Gamer, 3rd Eye, Sports, eDream,



Firmware version

Hardware Version

20 reviews for Go Flow 4 tDCS Brain Stimulator

    February 14, 2017

    Is this working

    Lest see.. Is this product working? I see a lot or People saying: there isnt any instructions.. Thats the problem, iam spanish guy and it is hard to understand all so if this product havent got any instructions then is a shit.. I want something to improve my depression
    1 0
    March 22, 2016

    Got Burned.

    This seemed like a great idea with an even better price. The first time I tried the "learn faster" configuration at 1.5 mA for 15 min. I felt a little "pinching"at the shoulder pad and when I was finished there was a mark there. I checked the connections to make sure I had things set correctly (I did) and figured that it may have been due to my rather haphazard pad placement.

    The next time I tried it I was more careful. I shave the area on my shoulder, wiped the skin with a little soap and water and once that had dried I carefully placed the pads, again in the "learn faster" configuration. This time I turned it down to 1.0 mA for 15 minutes. Again I felt a sharp, burning, pinching sensation at the shoulder pad location. This did diminish over the course of 5 minutes or so. When I was done There was a reddish-white lesion a little bigger than a pencil eraser under when I removed the shoulder pad.

    This didn't hurt much so I didn't think much of it. A couple of days later I accidentally poked it and felt nothing which was concerning. I went into have it examined and was basically told that I had a small full-thickness or 3rd degree burn. The dead skin layer was cut away to allow healing and is doing well but is going to leave a scar.

    I definitely wanted to play with the Go Flow but for now I think I'm done. I don't think this will happen to everyone who uses this product. I may have a defective unit or my body chemistry might be off but I would say that if you feel like you are getting burned you probably are and stop your session.
    0 0
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