Feature:1. Multiple Functions: The fitness ring features real time synchronization with phone for accurate sports data tracking, including exercise modes, mileage stats, workout time, calories, and steps.2. Remote Care: The fitness tracker ring allows you to add family or friends to remotely view their daily exercise data, such as steps, mileage, calories, and sleep time, providing a way to care for loved ones from afar.3. Long Battery Life: Built in strong magnetic charging coil of this fitness health ring allows for quick and efficient charging in about 1 hour, with a standby time of up to 7 days.4. IP68 Water Resistant: With IP68 water resistant rating, you can wear the ring during showers, swimming, and hand washing, ideal for indoor and outdoor use.5. Lightweight and Enhanced Comfort: Made of stainless steel, the workout ring is resistant to wear and tear, lightweight to wear for enhanced comfort, also featuring stylish and simple appearance.Specification:Item Type: Smart RingMaterial: Stainless Steel, EPBattery Type: Lithium BatteryBattery Capacity: 20mAh (Included)Battery Life: Approx. 5 daysCharging Time: Approx. 30 minutesThickness: Approx. 2.5mm or 0.1inAPP: For Smart Health.Package List:1 x Ring1 x Charging Cable1 x User ManualNote:When wearing, please make sure the optical sensor is in close with the skin of the fingertip to ensure accurate data.