Feature:1. Innovative Design: Gesture to take photos, so you can easily record beautiful moments anytime, anywhere, and easily become your own professional photographer. It can operate various videos, web browsing, shopping, etc. to a certain extent.2. Sleep Monitoring: The smart ring health tracker scores sleep based on the ratio of rapid eye movement sleep, light sleep and deep sleep throughout the sleep cycle and gives you appropriate advice. Get a clearer understanding of the factors that affect your health and athletic ability.3. Fitness Ring: Smart ring records running distance, calorie consumption and activity time to keep in touch with progress. Supports a variety of exercise modes and map trace recording, including walking, running, cycling, etc. You can view APP data such as exercise time, distance and calories burned after exercise.4. Material: Lightweight and comfortable metal ring, sturdy and keep lasting performance. Simple design, comfortable to wear, takes up very little hand space, suitable for all day wear. Water proof rating IP68, can be applied during swimming, showering and other water related activities to maintain reliable performance.5. Lasting Battery Life: Adopting 17.5mAh lithium battery and extra low power control chip, after deep power management and low power mode selection, it greatly improves the endurance of the ring. Battery life is 710 days under normal use.Specification:Item Type: Smart RingMaterial: MetalBattery Type: Lithium ionBattery Capacity: 17.5mAh (built in)Water Proof Level: IP68Application Support: for Android 5.0, for IOS 10.0 and aboveRing Thickness: Approx. 2.8mm / 0.11inCharging Method: Magnetic ChargingStorage Capacity: 128kb ROM +96 Kb RAM.Package List:1 x Smart Ring1 x USB Cable1 x User Manual