[Elegant Design]R18 smart ring features exquisite enamel craftsmanship, combining style with functionality in a sleek, waterproof design. [Comprehensive Health Monitoring]Tracks heart rate, blood oxygen, exercise, and sleep patterns, providing real-time insights into your overall well-being. [Multi-Sport Modes]Supports various activities including running, cycling, jump rope, hiking, yoga, golf, and dance, recording exercise data in real-time. [Long Battery Life]Enjoy 3-5 days of active use or 7-10 days on standby, with a convenient magnetic charging case for easy power replenishment. [Smart Features]Remote camera control function allows you to capture photos by shaking the ring, adding convenience to your photography. [Durable Construction]Made with epoxy resin and stainless steel, featuring a beautiful enamel surface for both aesthetics and durability. Specifications: Basic Parameter Ring Internal Diameter（mm）  6# 16.5mm,  7# 17.3mm, 8# 18.1mm, 9# 18.9mm, 10# 19.8mm, 11# 20.6mm, 12# 21.4mm, 13# 22.2mm Weight 3.0~4.0g  Major function Steps, distance, calorie counting,Heart rate, Blood pressure, Blood Oxygen, sleep Monitoring, Care for faimilies(add friends), Remote camera   Chipset AC6323 APP Smart Health Compatible System Android 5.1 or Above, IOS8.0 or above RAM Memory 4Mb Type Not supported Screen size Not supported Resolution ratio Not supported Encoder Not supported Touch Type Not supported Connection parameter BT V5.0 Bluetooth-compatible chips BT Call Not supported WIFI Not supported NFC Not supported Sensor Sensor SC7A20H Gyroscope Not supported Heart Rate Goodix GH3018 GPS Not supported Battery Type Lithium Polymer Capacity Ring: 20mAh, Charging case: 400mAh Charging Method Magnetic Charging APP Software features Smart Health Steps, Miles, Calories, Motion data recording Heart rate monitoring, Blood pressure, blood oxygen monitoring, Sleep monitoring, body fatigue assessment Multiple exercise modes，Running, cycling, skipping, hiking, mountaineering, yoga, golf, dancing Supported languages: English, Simplified Chinese, Traditional Chinese, Russian, Ukrainian, German, French, Italian, Spanish, Portuguese, Polish, Greek, Romanian, Hungarian, Czech, Slovak, Irish, Croatian, Swedish, Danish, Finnish, Arabic, Farsi, Norwegian, Japanese, Korean, Thai, Vietnamese Other Partmeter Waterproof Level IP68 Charging time around 1-2 hours Life time 3-5 days, Stand by time 7-10 days Appearance material Epoxy Resin+stainless steel (Color enamels)