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Bitbrain Hero 9-channel EEG

The Bitbrain Hero is a 9-channel wearable dry-EEG device designed for quick setup and wireless recording. It is suitable for studies that require mobility and coverage of fronto-central, central and centro-parietal regions.

For full instructions, consult the official guide:
Hero 9ch EEG User Guide (EN, v.2025)

Bitbrain Hero EEG

Image © Bitbrain Technologies S.L. Used for documentation and identification purposes.

Overview

The Hero uses 10 dry sensors (9 EEG + A2 reference) and includes active shielding to reduce environmental noise. Data can be streamed via Bluetooth or saved to a microSD card. The system includes removable batteries and adjustable bands to fit different head sizes.

The EEG channels follow the 10-10 system:

  • FC3, FCz, FC4
  • C3, Cz, C4
  • CP3, CPz, CP4
  • Linked ear reference: A2
  • Ground and reference electrodes on the left clip

The device is intended for research use only.

Video Guide: Placement and Setup

Technical Specifications

  • Sampling rate: 256 Hz, 24-bit
  • Transmission: Bluetooth 2.1 + EDR (approx. 10 m line-of-sight)
  • Local storage: microSD (max 8 GB, Class 10), .sdf format
  • Battery life: > 3 hours
  • Battery type: Fenix ARB-L16-700U (removable, USB-rechargeable)
  • Charging time: ≤ 3 hours
  • Integrated IMU: accelerometer, gyroscope, magnetometer
  • Dimensions: 195 × 156 × 90 mm
  • Weight: 250 g (with battery)
  • Certification: CE (Directive 2014/53)

Full technical details are in the user guide.

System Components

The kit includes:

  • Hero 9-channel EEG device
  • Two rechargeable batteries
  • Chin strap (optional use)
  • Foam adjusters (S/M/L)
  • Elastic strap sets
  • USB–micro-USB cable
  • 8 GB microSD card + adapter
  • Band spacing ruler for 10-10 positioning

Descriptions and diagrams are available in the guide.

Setup Summary

1. Battery and Adjusters

  • Insert a charged battery with the device switched off.
  • Select matching foam adjusters for both sides so that the fit is stable and symmetrical.
  • Attach the chin strap if needed for movement-heavy tasks.

2. Power-On and Connectivity

  • Switch the device on.
  • The white LED flashes until Bluetooth is connected; steady white means paired.
  • The red LED indicates low battery.
  • Data can be streamed or saved to the microSD card at the same time.

Bluetooth pairing uses the device’s serial number.

Placement Summary

  1. Measure the nasion–inion distance and locate Cz (midpoint).
  2. Place the frame low on the head, with side supports resting above the ears.
  3. Align the three sensor bands:
  4. Middle band centered on Cz
  5. Use the spacing ruler to set the correct distance between FC, C, CP bands
  6. Gently rock each sensor to make contact with the scalp.
  7. Attach the A2 clip and ground/reference clips to the earlobes.
  8. Lower the adjusters to improve contact if impedance remains high.

Detailed placement steps and diagrams are in the guide.

Recording

  • Use Bluetooth to stream data to the acquisition software.
  • Enable SD Card Record in the software to save data locally.
  • Files on the microSD card use .sdf format; convert via Import Record in the Bitbrain software.
  • Avoid recording with a low battery.

Battery Handling

  • Remove the battery before charging.
  • Charge only via micro-USB on the battery itself.
  • Do not exceed 0.5 A charging current.
  • Do not store batteries long-term at full charge.

Cleaning and Maintenance

  • Clean and disinfect the headband after each use, according to user guide instructions.
  • Avoid liquids entering the sensors.

More Information

Full details, diagrams and safety information:
Hero 9ch EEG User Guide (EN, v.2025) – see attached PDF in this documentation.

Manufacturer: Bitbrain Technologies S.L., Zaragoza, Spain

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