Feature:1. MULTIFUNCTIONAL RING: It allows you to effortlessly access health data such as step counts and sleep patterns, helping you stay informed about your well being.2. VARIED SPORTS MODES: With support for activities like hiking, cycling, and running, it allows you to explore new boundaries while capturing data on exercise duration and steps taken in real time.3. APP: After wearing the ring, you can seamlessly link it to your smartphone app to gain accurate insights into your health data, fostering better habits and awareness.4. IP68 PROOF: Whether washing hands, showering, swimming, or engaging in shallow water dives, this ring is designed to function effectively without concerns about water damage.5. POWERFUL BATTERY CAPACITY: Featuring an 18mAh battery within the ring and a 300mAh charging case, it ensures extended usage without frequent recharges.Specification:Item Type: Smart RingMaterial: Stainless SteelRing Battery Capacity: 18mAh, Li Battery (Built in)Charging Case Battery Type: Li Battery (Built in) Charging Case Battery Capacity: 300mah.Package List:1 x Smart Ring1 x Charging Case1 x Instruction Manual1 x Charging CableNote:You can choose the size according to the inner diameter