Specifications:
Main control chip: NORDIC NRF52832 comes with 4.0 Bluetooth
Screen Size: 1.14" LCD 135*240
Battery type:Polymer Rechargeable Li Battery
Battery capacity: 140MAH
Charging voltage: 5V
Charging time: 1 hour
Working time: 7 days
Charging method: USB direct charge
Working temperature:-5---45°C
Waterproofing: IP67
Adaptation mode: Can be used independently or simultaneous with mobile app
Photoelectric sensing: self-contained + billion light PD70
Acceleration Sensor: Triaxial acceleration Rom KX1057
Compatible: iOS8.0 or higher Android4.4 or higher
Adaptation method: can be used independently or mobile APP
Supported language: English (content push multi-language)
Bare weight: about 29g
Single weight (including packing): about 76g
Packing dimensions: about 140*85*27mm/5.51*3.35*1.06in

Notices：
1.Don'tuse adapter with charging voltage>5V and charging current >2A.The charging duration is 90min.
2.Don't charge the device when the environment is water-damaged
3.Don't wear the device in,diving,going under water,taking a hot shower bath,and don't soak it.
4.The device is an electronic monitoring product and the result is for reference only instead of medical reference.
5.The test method of blood pressure:Please keep the body relaxed and still in testing,make sure the watch is on the same height with the heart.Don't speak in testing.
6.As the photo sensor is a high sensing element,please keep it from hard objects less it be damaged.The sweat and dust may attach to the surface of watch after you wear it for a period,just clean it regularly with a soft cloth.

List:
1*C20S Smart Watch
1*Charging Cable
1*Instruction manual