SR05 Ultra-thin Waterproof Multifunction Bluetooth Health Monitoring Smart Ring,No Charging Case - Tarnish/Size 12 •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