Feature:1. Sports Health Tracker Ring: Real time synchronization with your phone to accurately track your exercise data, helping you achieve daily goals, including sports modes, distance tracking, exercise time, calories burned, and step count.2. Bluetooth Connection: Connects to your phone via Bluetooth, keep Bluetooth on for automatic connection when the app is launched. The ring can also independently perform body supervise when not connected to the phone, allowing for data updates in the app once connected.3. IP68 Water Resistant: Suitable for various daily water related scenarios such as handwashing, bathing, swimming, etc. Made of stainless steel, weighs 5g, it is sturdy, lightweight and long lasting.4. Long Standby Time: The smart ring features built in powerful magnetic charging coil, allowing for efficient charging in about 1 hour, providing approximately 7 days of standby time.5. Present Choice: It is lightweight, fashionable, and comfortable to wear. It is an ideal present to make your friends and family feel special and appreciated. Also, it is a nice choice for weddings, graduation ceremonies and housewarming parties.Specification:Item Type: Bluetooth Health Tracker RingMaterial: Stainless SteelRing Battery Type: Lithium Ion BatteryRing Battery Capacity: 20mah (Built in)APP: for Smart Health.Package List:1 x Smart Ring1 x User Manual1 x Charging CableNote:Wear correctly: When wearing, make sure the optical sensor is in close contacting with the skin of the fingertip to ensure accurate data.