•[Fine Workmanship] Made of stainless steel, with a modern matte and glossy surface treatment process, it is not only stylish in appearance but also wear-resistant and corrosion-resistant •[Motion Sensing Game] Built-in motion gaming features accessible through the app, please wear the ring and move your fingers. The game follows the action •[Rate Rate Monitoring] Monitor your heart rate anywhere and anytime; open the app to view the heart rate data on the ring at any given time •[Sleep Monitoring] The ring automatically monitors your sleep quality when you fall asleep and generates a sleep report to help you develop good sleep habits •[Exercise Data] Accurately recording steps, calorie expenditure, distance, etc. Supporting your multiple exercise modes Specifications: Hardware CPU Pixart 2860 Material Stainless steel Bluetooth Version BLE 5.1 Battery capacity Polymer lithium battery 18 mAh with battery protection IC, charging case 280 mAh Working Time About 5-7days Charing time 0.5H G Sensor QMA6100P Heart Rate Sensor HX3605 Charging method Charging case Waterproof Level IP68 Charging Requirement Charging 1A or less Software APP ECTRI Function Heart rate detection Blood oxygen test blood pressure detection Remote photography Multiple sport modes Gesture control (Tiktok photograph e-book music) Somatosensory games Sleep detection (Sleep time, Sleep quality) Step count Synchronous data to APK/APP APP Download Download "ECTRI" from Android market or for Apple store Scan the following QR code and download "ECTRI" Specification System Requirement Android: 6.0 or aboveiOS: 11.0 or higher Environmental requirements Operating temperature: 0~45℃ Storage temperature: -10~55℃ Working humidity: 5%~95% (non-condensing) Size(mm) 8 circumference 56.9, diameter 18.1 9 circumference 59.5, diameter 18.9 10 circumference 62.1, diameter 19.8 11 circumference 64.6, diameter 20.6 Package included: •1 x Smart Ring •1 x Charging Cable •1 x Charging Case •1 x English User Manual