Specifications include, but are not limited to: Wearable Sensing DSI-24-A System, or equal • One (1) Adult-Size Headset, 52-62cm head circumference) • Twenty One (21) Active Dry Electrode Sensors at the following International 10/20 System Locations: Fp1, Fp2, Fz, F3, F4, F8, Cz, C3, C4, T3, T4, T5, T6, Pz, P3, Pr, O1, O2, A1, and A2. • One (1) Common-Mode Follower (ref), Active Sensor at Pz • One (1) Ground Electrode • Three (3) Auxiliary Inputs for external sensors • One (1) 24-channel wired and wireless amplifier and digitizer • One (1) 8-Bit Digital Trigger Input Port • One (1) µUSB Wire Data Output Port • One (1) USB Blue Tooth Adapter • One (1) USB-µUSB Cable; Wearable Sensing VR Adapter for DSI-24 VR+24, or equal • Virtual Reality (VR) Head mounted display (HMD) Adapter Kit for the DSI-24 Dry Electrode EEG Headset • Includes all necessary components to attach a VR HMD to Wearable Sensing’s DSI-24’Compatable with HTC Vive, HTC Vive Pro, HTC Vive Pro Eye, Oculus Rift, Oculus Quest; Wearable Sensing Bipolar 20 Sensor EXG-Bi-20, or equal • Active Try Electrode sensors that plugs into the auxiliary input channels of DSI-24 or DSI-EEG-fNIR systems and allows recording one (1) differential lead of stat. Sensor can be used for EEG, EOG, ECG, or EMG recording. Auxiliary sensors to be supplied with one medium Velcro strap harness for positioning on the chest for ECG, two small Velcro strap harnesses for positioning on limbs for EMG, and spare reusable dry electrode tips as well as single-use stick-on get-tipped electrods for attaching to the face for EOG or skin for EMG or ECG. Item 4: Wearable Sensing Bipolar 40 Sensor, EXG-Bi-40, or equal • Same specification as Item 3; Item 5: Wearable Sensing 60 Sensor EXG-Bi-60, or equal • Same Specification as item 3; Item 6: Wearable Sensing GSR Sensor, or equal • Consists of dry electrodes with an electronic interface to allow the sensor to plug into the auxiliary input channels of a DSI-24 system, or to replace a DIS-7 or DSI-VR300 Sensor. The sensor should record electrodermal conductivity from the fingertips with included attachment straps. Item 7: Wearable Sensing Respiration Belt, Resp-Belt, or equal • Consists of a stretch detector attached to an elastomeric belt that should pug into the auxiliary channel of a DIS-24 system or replace a DSI-7 or DSI-VR300 sensor. The belt should reford changes in the circumference of the chest associated with breathing. Respiration data should be captured digitized with the EEG data. Item 8: Wearable Sensing Skin-Temperature Sensor, or equal • The temperature sensor is a thermistor that should plug into the auxiliary input channels of a DSI-24 system or replace a DSI-7 or DSI-VR300 sensor. It should record skin temperature and include straps for attachment to arms or chests. Item 9: Wearable Sensing 3D Accelerometer, or equal • The DSI system should have an internal 3D acetometer that should be digitized simultaneously with other data streams at a 30 Hz sampling rate. Item 10: Wearable Sensing 600 Hz-Sampling Rate, or equal • Designed for USB-wired mode data transmission. The system should stream at 600 Hz wirelessly by Bluetooth. Data packets may be dropped in environments with wireless interference.