Feature: 1. Accurate Step Tracking: NFC smart ring instantly synchronize your smartphone with accurate tracking of your exercise data, helping you achieve your fitness goals efficiently. 2. Smart NFC Ring: With an integrated NFC chip, the ring allows for swift access control. Just a touch against a sensor enables quick entry, eliminating the need for keys or cards for seamless access. 3. 5ATM IP68 Water Resisting: Boasting 5ATM and IP68 water resisting rating, this smart ring is ideal for wearing in the rain, swimming, or washing hands. Its simple yet elegant design complements any occasion. 4. Magnetic Charging: The smart ring health tracker is built in strong magnetic coil for efficient charging. Simply attach it to begin charging, and it takes about an hour to fully charge. 5. Lightweight and Sturdy: Smart fitness tracker ring weighs approximately 3-5g and is crafted from ceramic, smooth surface, representing a seamless blend of minimalism and durability. Specification: Item Type: NFC Smart Ring Material: Ceramic Ring Battery Type: Lithium Ion Battery, 20mAh (Shipped with). Package List: 1 x Smart Ring1 x User Manual1 x Charging Cable