BrainBit Flex4
4-Channel Wearable EEG Neural Interface

Targeted 10–20 coverage with instant dry-electrode setup, portable streaming, and a free SDK.

BrainBit Flex is a 4 channel wearable EEG neural interface with free electrode location that provides accurate and reliable registration of the electrical activity of the brain. The unique and convenient electrode fixation system makes the session easy and varied. You can study exactly those points and biorhythms of the brain that are of interest to you.

Flex4 is intended for research, education, training, and wellness use; it is not marketed as a diagnostic or therapeutic medical device.

Key features

Key Features

Flexible placement. Clean signals. Developer-ready.

4 Channels, Free 10–20 Placement

Position electrodes where your protocol needs them.
Wireless Streaming (BLE)

Real-time acquisition to desktop or mobile apps.
Removable/Rechargeable Battery

Built for portable sessions and field studies.

Dry & Wet Electrode Options

Fast setup without gels; wet compatible when preferred
High-Fidelity, Low-Noise Signals

Compact wireless amplifier delivers clean EEG.
Free Cross-Platform SDK

Build with .NET, React Native, Unity, C++, Java, Python.

Ready for Reliable Data

Faster placement, better signal quality - watch the 2-minute walkthrough

Extremely flexible system

BrainBit Flex is a 4-channel consumer EEG device with Bluetooth LE connectivity. Four channels with dry golden-plated electrodes can be applied to custom selected points according to the 10-20 international scheme on a textile cap. Easy and accurate. The reference and common electrodes are made in the form of ear clips.

Use without limits

BrainBit Flex is an EEG solution that is absolutely perfect for research and developing. The device is compatible with a variety of neurofeedback tools. Free electrode location unlocks great opportunities to discover more inside your brain and mind. Create, research, develop, invent. BrainBit Flex will help you.

Designed for Modern 4-Channel Workflows

Flex4 balances speed and flexibility: four channels for targeted placements, quick setup, and high signal reliability—ideal for applied research, non-medical neurofeedback/biofeedback training, university labs, demos, and neurotech prototyping.

See Flex4 in action

4-channel EEG for neurofeedback training

Fast setup and focused signals for efficient, non-medical training. Flex4 pairs dry-electrode convenience with targeted 10–20 placements, so you can launch sessions quickly, monitor in real time, and refine protocols without heavy lab workflows. Use BrainBit software or your own apps to review progress and keep data portable for analysis.

Targeted 10–20 placements - place four channels where your protocol needs them.
Real-time streaming & review - monitor, annotate, and adjust sessions on the fly.
Track core bands; export CSV/EDF+ - keep data compatible with your analytics stack.
Works with NeuroFit PRO & NeuroRec - guided training programs and reliable recording.

Technical Specifications

Flex4 Configuration
- ● 4 EEG channels at any point on 10-20 scheme
- ● Golden plated Reference and GND electrodes as ear clips
- ● Dry golden plated spring-loaded electrodes
- ● Removable battery unit4 EEG channels: O1, O2, T3, T4
Flex4 Electronics
- ● Sampling rate: 250 Hz
- ● Measured voltage range: ± 0,4 V
- ● Battery charge time: up to 4 hours
- ● Continuous work time: 12 hours
- ● Raw signal band from 0 Hz to 100 Hz
- ● Communication interface: BLE
Usability & Service
- ● Lightweight and portable amplifier
- ● Easy to wear due 2 caps sizes
- ● Attach electrodes at any point
- ● 1-year warranty
- ● FCC Declaration, CE Certificate
- ● Shipping worldwide
Software
- ● Charge Free SDK for: Java, Kotlin, Objective-C, Swift, C++, C#, Python, ReactNative, Unity, Xamarin
- ● Supported platforms: iOS, Android, Windows, MACOS, Linux
- ● Extracting all brain rhythms: Delta, Alpha, Beta, Theta, Gamma
- ● Artifacts detection algorithms

Supported Software

Record, train, and analyze with tools optimized for BrainBit Headband

NeuroFit PRO

Guided Neurofeedback Suite (by BrainBit)

Modern training programs and session management for teams and practitioners.
- Ready-made protocols for focus, relaxation, and resilience
- Live metrics with progress tracking and reports
- Custom session builder and presets
- 38 neurofeedback colorful games

BrainAssistant

Comprehensive Neurofeedback Platform (by Brainboost)

Modern software designed for guided brain training with clean clinician/practitioner workflows.
- Intuitive session design with real-time EEG views
- Adaptable protocols for focus, relaxation, and mental clarity
- Dual-view interface for facilitator and participant
- Progress tracking with visual feedback loops
- Generate brain maps and reports in just minutes

Divergence Neuro Platform

Cloud-Connected EEG Tools for Coaching & Research

Evidence-informed platform for scalable neurofeedback and wellness programs.
- Guided EEG exercises for focus, balance, and recovery
- TheraQ™ Assessments to evaluate cognitive and emotional states and track change over time
- Real-time dashboards for coaches and teams
- Cloud session tracking and analytics
- Data privacy controls and compliance features

NeuroRec

Free Recording & Review Software (by BrainBit)

Raw data capture, fast review, ready for export
- Raw data recording
- Filter library & spectral analysis
- Reports
- Heatmapping: 2D & 3D
- Export formats: CSV, EDF+

White-Label & Custom Branding

Launch Flex-4 under your brand with proven BrainBit hardware and software

Custom logo, colors, packaging, and documentation
Optional software branding (NeuroRec UI, reports)
Preconfigured workflows and presets for your market
Developer support and SDK/API for integrations

FAQs: 4-Channel EEG Essentials

What is a 4-channel EEG used for?

Targeted recordings with quick setup great for applied research, training, and prototyping.
Does Flex4 support the 10–20 system?

Yes. Electrodes can be placed at the 10–20 sites your protocol requires.
Do I need gels?

No gels are required with dry electrodes; wet electrodes are supported if preferred.
Can I export EEG data?

Yes, using BrainBit software you can export to standard formats like CSV and EDF+.
Is there a developer SDK?

Yes. The SDK is free and supports multiple languages and platforms (desktop & mobile).
Is Flex4 a medical device?

No. It’s a research/training/wellness device and not intended for diagnosis or treatment.

Get Started with BrainBit Flex4

BrainBit Flex44-Channel Wearable EEG Neural Interface

Key features

Key Features

4 Channels, Free 10–20 Placement

Wireless Streaming (BLE)

Removable/Rechargeable Battery

Dry & Wet Electrode Options

High-Fidelity, Low-Noise Signals

Free Cross-Platform SDK

Ready for Reliable Data

Extremely flexible system

Use without limits

Designed for Modern 4-Channel Workflows

4-channel EEG for neurofeedback training

Technical Specifications

Flex4 Configuration

Flex4 Electronics

Usability & Service

Software

Supported Software

NeuroFit PRO

BrainAssistant

Divergence Neuro Platform

NeuroRec

White-Label & Custom Branding

FAQs: 4-Channel EEG Essentials

Get Started with BrainBit Flex4

Ready to deploy a flexible, portable, developer-ready 4-channel EEG?

BrainBit Flex4
4-Channel Wearable EEG Neural Interface