CPU：zhong ke AB2026B3

APP：Darings

Bluetooth Version: 5.2

Size：#7(Inner diameter 17.3mm)，#8(Inner diameter 18.2mm)#9(Inside diameter 19.0mm)，#10(Inside diameter 19.9mm)，#11(Inside diameter 20.7mm)，#12(Inside diameter 21.5mm) ，#13(Inside diameter 22.2mm，

Thickness 2.6mm

Material: Case: Ceramic with added NFC(NFC chipset:FUDAN MICRO M1)

Water proof：5ATM 

Weight：2.9g

Memory (ROM+RAM): Maximum clock speed of 120M RAM, 64KB+8K cache

G-Sensor：SC7A20H 

MobileAPP-GPS: Yes

Heart rate sensor: Heavenly Harmony 3918

Battery Type: Polymer battery

Operating temperature range: 0-50℃

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

Charging time: 1.5H

Theory Standby time: 10 days. -15 days

Normal using time: 3 days - 5 days

Charging: Magnetic charging

Color: Black, White

APP software functions: 

Activity: Distance/calories/daily steps statistics / 7-day goal achievement/effective activity, etc

Multisports: There are 24 kinds in total: 19 kinds of regular sports +5 kinds of GPS sports

Heart rate: APP launches heart rate test/all-day dynamic heart rate trend and data analysis/heart rate data analysis/Recent 7 heart rate measurement trend/heart rate history data

Sleep: Sleep data statistics, sleep proportion, sleep score, sleep analysis, average sleep heart rate, etc

Blood oxygen: APP initiated blood oxygen test/recent 7 blood oxygen data/Recent 7 blood oxygen saturation measurement trend/historical blood oxygen data

HRV: APP initiated HRV test/nearly 7 HRV data/average HRV during sleep/stress history data

Stress: APP initiated blood oxygen test/Nearly 7 pressure measurement trends/pressure history data

Others: Unit format, sedentary reminder, low battery reminder, heart rate warning

Wechat&Apple: Access wechat Sports and Apple Health

APP multi-Language support: Multiple languages

Support OTA: Supports Fota upgrades