IP68 Waterproof: The fitness tracker ring adopts fully enclosed structure and IP68 waterproof technology, which can be worn for swimming and diving, and supports 1000 meters waterproof, which is very comfortable to wear and meets the needs of daily wearNo APP Subscription Required: The blood pressure ring connects to your cell phone via Bluetooth, and the health tracker can monitor your health and exercise data at any time without additional subscSmart Ring: The smart ring health tracker can monitor your sleep, heart rate, blood pressure, blood oxygen and daily exercise through the APP 24 hours, it is compatible with Android 5.0 and above system and Apple IOS10.0 and above systemExtended Battery Life: Sleep Tracker Ring is up to about 5-7 days and can be fully charged within 1 hour. It also comes with a mini charging case, convenient for daily traveling and ensuring a stable battery life experienceFamily Care: The APP supports adding friends, you can use the app to check the measurement data of your family members at any time, including steps, blood oxygen, blood pressure, sleep and heart rate data, which is convenient to care for your family members in time