SR09 Smart Ring Health Tracker Waterproof Fitness Sleep Monitor Bluetooth-Compatible 5.1 Heart Rate Blood Oxygen Monitor

Specification:
Origin: Mainland China
Product name: Smart ring
Size: Size: 7 (inner diameter 17.4mm), 8 (inner diameter 18.2mm), 9 (inner diameter 19.0mm), 10 (inner diameter 19.9mm), 11 (inner diameter 20.7mm), 12 (inner diameter 21.5mm)
Material: Stainless steel + glue filling process
Waterproof: 5ATM waterproof, can be worn for diving or snorkeling, supports waterproof depth of more than 50 meters
Main chip model: German Dialog DA14531) – ultra-low power consumption, more 
Body storage capacity (ROM+RAM): 144kb ROM + 48 Kb RAM
Sensor: SC7A20
Bluetooth-Compatible version: 5.1
Support APP-side GPS data: yes
Heart rate sensor model: Tianyi 3918
Battery type: polymer pure cobalt battery
Working temperature: 0-50℃
Battery capacity: 16mah
Charging time: 2 hours
Theoretical standby time: 10-15 days
Usage time: 7-9 days
Charging: magnetic charging + charging box (charging box is not included in the delivery)
Compatibility: Support for Android 9.0 and above; for Apple IOS 10.0 and above
APP: Jring
Packaging size: 80*80*30mm
Gross weight: 66g

Note:
Due to different monitor settings and lighting conditions, the actual color of the item may vary slightly from the pictures. Thanks for your understanding!
Please allow a 1-2 cm difference in measurements due to manual measuring.