Main chip: Zhongke, low power consumption, more durable

Battery: 12mah for small size,20mAh for big size

Product dimension: # 8 (inner diameter 18.2mm), # 9 (inner diameter 19.0mm), # 10 (inner diameter 19.9mm), # 11 (inner diameter 20.6mm), # 12 (inner diameter 21.5mm)

Thickness: 2.7mm

Color: Gold, Black, Silver

BT: 5.1

Battery: 12mah for small size,20mAh for big size

Charging method: Magnetic charging, equipped with a charging compartment

Waterproof level: IP68

Charging time: 1 hour

Standby time: 7-10 days

Usage time: 3-5 days

APP supports languages: multiple languages

Product Function:

Heart rate, blood oxygen, HRV physiological cycle

Data synchronization app: Supports

Exercise: mileage, calorie steps

Sleep: Total sleep, deep and shallow sleep time, data