[Advanced Health Monitoring]Equipped with heart rate and blood oxygen sensors for comprehensive health tracking, including sleep analysis and dynamic heart rate trends. [Waterproof Design]IP68+5ATM water resistance, suitable for swimming and diving up to 50 meters deep, ensuring durability in various water activities. [Long Battery Life]Up to 5 days of normal use and 20 days standby time, with a quick 1-hour charging time for uninterrupted tracking. [Smart Gesture Control]Innovative features allow for hands-free control of your smartphone, including scrolling through social media apps and remote photo capture. [Comfortable Ergonomic Design]Crafted from stainless steel with a gel-filled interior, available in multiple sizes for a perfect fit, lightweight design for all-day comfort. [Versatile Compatibility]Supports Android 9.0+ and iOS 10.0+, with multi-language support and OTA upgrade capability for continuous improvement. Specifications: Water Proof IP68+5ATM class waterproof, diving or snorkeling can be worn to support more than 50 meters depth waterproof Material process Stainless steel + glue pouring process Size Inner Diameter:#7(17.4mm)  #8(18.2 mm)# 9(19.0 mm) # 10(19.9 mm) # 11(20.7 mm) # 12(21.5 mm) # 13(22.3 mm) thickness 2.7mm Weight about 3.2g Chipset (main chip model) PAR2860-ultra-low power, more durable Memory (ROM+RAM) 512 KB ROM + 32 KB RAM G-Sensor SC7A20H Bluetooth-compatible Version 5.0 MobileAPP-GPS Yes Heart rate sensor HX 3918 Battery Type Polymer Pure Cobalt Battery Operating temperature range 0-50℃ Battery Capacity ring: 16mAh, charging case: 200mAh Charging time 1 hour Theory Standby time 16-20 days Normal using time 4-5 days Charging  charging case Software Function&App Compability Android 9.0 and above; for Apple IOS 10.0 and above Compability Software RWFIT APP Software Function Module Notes Multisports Multiple movement modes Heart rate App initiates heart rate test/whole day dynamic heart rate trend and data analysis/heart rate data analysis/recent 7 heart rate measurement trend/heart rate history data Sleep Sleep statistics, sleep proportion, sleep score, sleep analysis, average sleep heart rate and so on Blood oxygen App initiates oximetry test 7 times oximetry data 7 times Oxygenation trend oximetry historical data Call Alert The phone flashes a white light when there's an incoming call, and the flashing stops when you answer or hang up Message Notification Blue light blinks five times for a message Social software Phone calls, text messages, email, Skype, facebook, whatsApp, Naver Line, instagram, kaka talk, gmail, twitter, linkedin, weibo, QQ, Wechat, band, telegram, between, naverCafe, youtube, netFlix Hand gestures brush tiktok Smart ring brush Tiktok is a new interactive way. Through the connection with the mobile phone or other devices and specific technical support, the smart ring can realize some operation control and page turning of the Tiktok application, which provides users with a more convenient and innovative experience. Without directly touching the mobile phone screen, it can operate Tiktok, various videos, browse the web, shop, etc. to a certain extent  Wave your hand to take a picture immediately Innovative design, so that you can easily capture the beautiful moment anytime and anywhere. Selfie new height, one finger trigger beautiful smart ring, remote control photography, so that you can easily become their own professional photographer APP multi-Language support National language: multilingual APP Support OTA  Support for FOTA upgrades APP RWFIT