SR05 Ultra-thin Waterproof Multifunction Bluetooth Health Monitoring Smart Ring,No Charging Case - Bright Silver/Size 11 ?Heart Rate: App-initiated heart rate test/all-day dynamic heart rate trend and data analysis/heart rate data analysis/last 7 heart rate measurement trends/heart rate history data ?Sleep: Sleep data statistics,sleep ratio,sleep score,sleep analysis,average sleep heart rate,etc. ?Blood Oxygen: App-initiated blood oxygen test/last 7 blood oxygen data/last 7 blood oxygen saturation measurement trends/blood oxygen history data ?Gesture Control for TikTok: The smart ring allows you to control the TikTok app through gestures,offering a convenient and innovative experience without touching the phone screen. It enables browsing videos,webpages,shopping,etc. ?Gesture Photography: Capture beautiful moments effortlessly anytime and anywhere with this innovative design. The smart ring allows remote control for photography,making it easy to take selfies and professional photos ?5ATM Depth Waterproof: Fully enclosed structure,5ATM level waterproof technology,swimming,diving or snorkeling can be worn,support 50 meters depth waterproof,to meet your various waterproof needs ?Sports Modes: Support a variety of sports,including walking,running,cycling and other sports Specifications: ?Material: Titanium alloy ?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 ?Thickness: 2.5mm ?Weight: about 2.5g ?Main Chip Model: Dialog DA14531 - Ultra-low power consumption for longer battery life ?Storage Capacity (ROM+RAM): 128kb ROM + 96Kb RAM ?Sensor: SC7A20 ?Bluetooth Version: 5.1 ?Supports APP GPS Data: Yes ?Heart Rate Sensor Model: HX3602 ?Battery Type: Polymer Pure Cobalt Battery ?Operating Temperature: 0-50?? ?Battery Capacity: 14mAh ?Charging Time: 2 hours ?Theoretical Standby Time: 10-15 days ?Usage Time: 7-9 days ?Charging Method: Magnetic Charging ?Compatibility: Supports Android 5.0 and above; iOS 10.0 and above ?Operation Definition: Ring without touch and buttons; App initiates sports and function tests ?Multi-Sport Mode: Support Multiple sport modes ?WeChat Sports/for Apple Health: support ?OTA Upgrade: Supports FOTA upgrade ?APP: Jring Package included: ?1 x Smart Ring ?1 x Charging Cable ?1 x English User Manual