Dry-contact electrodes
There are two frontal electrodes with golden pads and two spring-loaded spike electrodes placed over the occipital cortex region. The reference and bias electrodes are located at the Fpz position.
BrainAccess HALO
The BrainAccess HALO is a fully integrated EEG headband featuring dry contact electrodes and a 4-channel EEG acquisition system with a common reference channel. The headband is semi-flexible and adjustable and can fit most of the head sizes.
Overview
Extremely portable
BrainAccess HALO integrates a full EEG acquisition system (electrodes, electroencephalograph, battery, and Bluetooth connectivity) while maintaining a small form factor making it a truly portable device.
Highly adjustable
The front and back parts of the headband can slide forth and back adapting to different head sizes. Cushioning around electrodes allows for the electrodes to change direction and conform to the curvature of the head. Extra cushions that are removable from the side boxes are provided that increase the band's stability on the head and may be more comfortable for some users.
Long operating times
The HALO is equipped with a high-capacity battery, which ensures long operation times and up to 8 hours of continuous data streaming before the need for charging.
Controls and Indicators
The user interface for the BrainAccess HALO is located at the bottom of the right side box.
Power button
Touch and hold a touch button for a couple of seconds to turn the device on/off. The blue LED will start breathing once the device is on.
Connection LED
After powering up this LED goes into breathing mode. If a Bluetooth connection is established between a computer and the device it turns solid blue.
Charging port
The device's battery can be charged via a micro-USB port using standard 5V chargers such as mobile phone chargers with a micro-USB plug. The charger should be capable of providing at least 800 mA of current. Do not use the device when charging with chargers powered from grid electricity due to safety reasons and potentially 50/60 Hz noise affecting the signals. The device can be used when charging from a power bank though.
Power LED
It is a red-colored LED that indicates the battery and charging status. If the power LED starts blinking, it indicates that the battery level is below 10%. When the device is charging the LED starts breathing and turns solid red when fully charged.
Specifications
Connectivity | |
Type | Bluetooth 4.2 |
Range | up to 10m (using the provided Bluetooth adapter) |
EEG data | |
Number of channels | 4 with a common reference channel |
Sampling frequency | 250 Hz |
Input resolution | 24 bits |
Analog gain values | 1, 2, 4, 6, 12, 24 |
Input voltage range | 4500 mV / gain value (w.r.t. reference channel) |
Accelerometer | |
Number of axis | 3 |
Sampling frequency | 50Hz (resampled to 250Hz in software) |
Range | +/-2g |
Resolution | 10 bits |
Battery | |
Type | Li-Po |
Capacity | 1500 mAh |
Operating time | up to 8 hours (continuous streaming, all channels turned on) |
Charging time | 2 hours |
Charger input | 5V 800 mA min (charger not included) |
Charger connector | micro-usb |
Mechanical | |
Mass | 210g |
Dimensions | 210x201x41 mm |