1.[Master chip] NORDIC 51822 BLE4.0
2.[PCBA stack dimension] 35*14.4*0.6mm (housing/battery/screen, etc. are provided at the same time)
3.[OLED module] 0.49 inch resolution: 64*32
4.[Gravity sensor] YES
5.[Heart rate sensor] YES
6.[Blood pressure sensor] YES
7.[Battery] Polymer battery Design according to the structure
8.[Vibration motor]