Domhong Smart Ring - Fitness Tracker Heart Rate/Blood Oxygen 5ATM Waterproof

Slip on the future. Our smart ring, your ultimate portable tech sleep ring / health ring / fitness ring / exercise ring / bluetooth ring / workout ring / best smart ring / fitness tracker ring / health tracker ring / sleep tracker ring / step tracker ring / smart health ring / heart rate ring / heart monitor ring / vital health ring / fitness tracker / health tracker / step tracker / sleep tracker / smart ring health tracker / smart ring for women / smart rings for men / health rings for women / health rings for men Package contains: 1 smart ring, 1 charging case, 1 charging cable, 1 instruction manual Product Parameters: Product Size: #7(17.5 mm) # 8(18.3 mm) # 9(19.2 mm) # 10(20 mm) # 11(20.9 mm) # 12(21.6 mm)# 13(22.4 mm) Product Weight: 3.6g Battery Capacity: 15mAh (18mAh for #10 and above) Charging time: 1.5 hours Normal using time: 5-7 days Compability: Android 5.1 and above; IOS 8.0 and above Chipset (main chip model): RTL8762 ESF FLASH memory: RAM104KB FLASH 512KB Sensor: Silicon Motion STK8321 Bluetooth Version: 5.2 Heart rate sensor: Vcare VC30F-S Product Functions: Health Tracker, Fitness Tracker, Stress Tracker, Sleep monitor, HRV, Multisport Tracker, etc. Special Feature: Lightweight, Activity Tracker If you have any questions, please contact us immediately, we will answer all your questions within 24 hours