Case Material:  Stainless steel

Chipset :Nordic NRF52832 

G-Sensor:Sensor LIS2DW12

Heart rate sensor:MAX86174A

Battery Capacity:17.5 mah 

Normal using time:10-15 days

Standby time:20-31 days

Function： 

Automatic heart rate test

Automatic blood oxygen test while sleeping

Automatically test HRV 

Automated stress testing

Sleep data statistics, sleep stagin