SR03 Ultra-thin Health Monitoring Smart Ring Waterproof Intelligent Finger Ring with Charging Case - Silver/Size 12 •With 3 colors and multiple sizes to choose from,you can choose the one that fits you the most •Ultra-thin and fine workmanship,lightweight and comfortable to wear on the finger •24/7 intelligent monitoring,integrating health into your daily life,multi-dimensional health monitoring •The ultra-small PPG sensing chip that combines lower power consumption infrared (IR),red,and green LED lights only requires Easily connecting to the app,choosing automatic measurement of blood oxygen,heart rate,sleep,etc.,and can define monitoring intervals and generate detailed health reports •The ring built-in 17.5mAh capacity polymer battery,with a charging compartment,with long standby and use time,greatly improving the battery life performance of the ring •Specifications: •Waterproof: 5ATTM waterproof •Material: stainless steel •Size: •Size 8: inner diameter 17.4mm •Size 8: inner diameter 18.2mm •Size 9: inner diameter 19.0mm •Size 10: inner diameter 19.9mm •Size 11: inner diameter 20.7mm •Size 12: inner diameter 21.5mm •Thickness: 2.5mm •Chipset: German Dialog DA14531 •Memory: 128kb ROM + 96 Kb RAM •G-Sensor: SC7A20 •Bluetooth Version: 5.1 •Mobile APP-GPS Data: Yes •Heart rate sensor: HX3602 •Battery Type: Polymer pure cobalt battery •Operating temperature range: 0-50℃ •Charging case battery capacity: 200mAh •Ring battery capacity: 17.5mAh •Charging time: 2 hours •Ring Theory Standby time: 10 days-15 days •Normal using time: about 10 days •Charging: Magnetic charging + charging box •Compatibility: Support Android 5.0 and above; for Apple IOS 10.0 and above •APP: JYOUPRO •Heart rate: APP initiates heart rate test/all-day dynamic heart rate trend and data analysis/heart rate data analysis/recent 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 initiates blood oxygen test/recent 7 blood oxygen data/recent 7 blood oxygen saturation measurement trends/blood oxygen history data •Operation: The ring has no touch and no buttons; App initiates exercise and function test Package included: •1 x Smart Ring •1 x Charging Case •1 x Charging Cable •1 x English User Manual