Go Flow 4 tDCS Brain Stimulator

focus go flow & 9v battery Go Flow 4
Foc.us Go Flow 4 - the Most Powerful, tDCS Available Anywhere.

NEW: Includes 0.75Hz sotDCS mode - slow oscillating transcranial Direct Current Stimulation.

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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.

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

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

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.

Tab Content

Stimulation Montages with Go Flow™

tDCS Montage

sotDCS Montage

  • Get started with tDCS

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*see cart for details



Additional Information

Maximum Current 4.0mA
Firmware version 4.0
Hardware Version 4.0
Technology sotDCS, tDCS

Ratings & Reviews

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Most Helpful Customer Reviews
  • 3 of 3 people found the following review helpful

    No problems so far

    I've used my foc.us v1 for a few years to treat depression, and my go flow does the same job in a more convenient package at a much lower price.

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  • 1 of 1 people found the following review helpful

    Got mine today!

    Trying it out now as I write. Arrived early, nicely packaged and looks to be good quality. Wish they had spent more than 1 minute on the directions though. It says to Connect battery (check-easy, its a tight fit though), Change current indicated (check-trial and error showed me its a rocker panel, orange lights went up and down on the dual indicator) Press to set (check-seemed like it took the setting ) Set duration (check-dual indicator goes from 5-35 minutes) Press to start. Here's where the problem begins. Pressing rocker panel turns lights off, then cycles orange and green lights through range-now you're left with just the orange (current) lights on. Is it on? Is it off? Is it waiting for instructions? Is it working? Shouldn't the timer lights be on, counting down? Whats going on Focus-you're leaving us hanging?

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  • 1 of 1 people found the following review helpful

    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'.

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  • 1 of 1 people found the following review helpful

    No idea

    Theres little to no information included with the product. I've used it a few times now and the electrodes started looking dark brown and stopped sticking completely so i tossed them. That was probably 6 to 8 sessions. Also, the placement of the electrodes is, um, ok, I guess. left forehead, right shoulder, to speed up learning, but I've noticed no enhancement. No real sign that its working other than the stinging at the start but it goes away. so was it stinging b/c that is the only time the current was moving or what? I'm going to continue using it and will see if anything changes but as of right now, I feel this is a novelty.

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  • 1 of 1 people found the following review helpful

    Where are the directions?

    Hey I don't want a LOT of instruction but telling me what X and Y mean would be fantastic.

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