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

    November 4, 2018


    very good
    0 0
    February 21, 2018


    for 150 euros you would think some intructions would be included, but no....
    0 0
    February 27, 2017

    Not fake review

    I bought this device not from here but from CAPUTRON site because reading their reviews from their page were best from this page, so better communication with the staff.

    About the product: Same as the picture they show BUT without any colors, the numbers are imprinted in the same plastic device. Other thing is that they did not send me the sticky electrodes patches which i really don't mind because i prefer to use the sponges with the headband.

    The product came with no instructions but i did not mind because i made my research before ordering and i knew about that issue and searched for online instructions. So if you are new in this therapy i suggest to make a research previously which you definitely should, this is not a toy.

    The device works perfect and it is easy to use, just to clicks on the only button it has and your done. instructions are on this page nothing out of this world.

    I have depression and anxiety, i have used this device 7 days (20 minutes a day) on the most researched electrode positions which is X - Anode in left F3 Region and Y-Cathode in right Fp2 and i REALLY felt and still felling that something is going on for a better, as im doing the tDCS session i'm doing at the same time cognitive games from this page (Unobrain) i've read that stimulating your brain while using tDCS is way better.

    Final thoughts: Very happy with this little tDCS device, works perfectly and seems to be working on me. Recommended.

    0 0
    September 10, 2016

    Go Floe

    My Go flow to reach me worked perfect.
    Thank you very much
    0 0
    July 26, 2016

    Where are the directions?

    Hey I don't want a LOT of instruction but telling me what X and Y mean would be fantastic.
    0 0
    The real deal
    April 17, 2016

    Ok but too small.

    I believe the unit is too small. It definatley works but at 99 dollars I would think they would give alot extras. I will keep on using it..
    0 0
    March 3, 2016

    Second Report

    Oops, I started to feel tingling
    0 0
    March 3, 2016

    Feel nothing!

    First report: I plugged in this morning and hooked it up as instructed (X is on the left forehead and Y is on the right shoulder blade) then I set for 35'. By some reasons I didn't feel anything. I then reset it to run for 5' and I still don't feel anything. I might have expected the tingling more than it should have been ... I don't know. I will submit my "Second" report after this 5'.
    0 0
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