APP: DArings

CPU: bluetrum, ultra-low power consumption, more durable

Product dimension: 18.2,19,19.9,20.6,21.5MM

Thickness: 2.7mm

Color: Gold, Black, Silver

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

BT: 5.1

Memory: 128K

Heart rate sensor: HX3918true heart rate, true blood oxygen

Charging method: Magnetic charging with a charging cable

Charging time: 1 hour

Standby time: 7-10 days

Usage time: 3-5 days

Water resistance: IP68

Packing box size: 90 x 80 x 36MM

Single packing weight: 98g

Carton size: 50pcs/ctn: 44*21.6*22cm, G.W.: 7.3kg

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.

APP supports languages: multiple languages