The LOWEST LATENCY EEG Headband

ZMax uses a proprietary radio protocol to ensure a low, predictable latency of EEG samples, as required by high performance real-time applications (such as Closed Loop Auditory Stimulation).

There are three sources of latency:

Packet acquisition to transmission: This is less than 3.9ms and absolutely constant.
USB: This is nominally 1ms but subject to variation depending on your OS and machine

On the other hand, the typical latency for a Bluetooth device (all other EEG headbands) is 50-100ms with up to 20ms jitter (variation between samples)!

Dual use electrode patches

ZMax electrode patches are dual-use. For CLAS studies, you can use our extension strip to bring the reference to M1 (mastoid). For other types of studies, using the patches as-is provides best comfort and ease of application for patients in the home.

Two paths to CLAS

There are two paths to implementing CLAS using ZMax:

• Use a ready made third-party solution developed specifically for ZMax: this is a plug and play solution requiring you to acquire third-party software from another vendor. However this software has been created specifically around the ZMax hardware. This is the easiest way (paper link: Deepening sleep using an EEG wearable featuring modeling-based closed-loop neurostimulation)
• Roll your own: grab raw bytes from the low-latency real time ZMax feed and do your own analysis. This requires significantly more time investment but has no extra software costs. The Hypnodyne software ecosystem provides some handy indicators of slow wave sleep to make your task easier.