Specifications Hign-concerned Chemical:None Waterproof Grade:5ATM Model Number: smart ring Display screen:No NFC Support:No Function:Message Reminder Activity Tracked:Activity Tracker,Steps Tracker,Distance Tracker,Calorie Tracker Metrics measured:Heart Rate Monitor,Blood Pressure Monitor,Sleep Monitor,Blood Oxygen Monitor Item Weight:10 Case Material:Alloy Certification:ce,DOT,FCC,EAC Brand Name:YeasMaie Battery Capacity(mAh):80 2025 New LED Display Screen Smart Ring For Ring Heart Rate And Blood Oxygen Monitor Smartring Men Women 5TAM Waterproof Multi Sports Modes Smart Ring Key Feature Model Name: Smart Ring APP:Qring Chipset: RTL8762 ESF Memory:RAM 104KBROM 512 KB BT: BT5.2 Waterproof grade:5ATM Body MaterialStainless Steel Battery: 15mAh Lithium polymer Charging Method: Wireless Charging Charging Time: About 1.5 hours Normal Using Time: 5-7 days (depending on personal habits) Standby Time: 7days-10days Supported Systems :Android 5.0 and above iOS 10.0 and above Functions description: 1> Daily activities: Step count, distance, calorie calculation 2> Health management: heart rate measurement, blood oxygen saturation, sleep tracking, multiple exercise modes, stress, heart rate variability 3> Touch function: single point switching display function 4> Display: time, steps, heart rate, battery level, likes count 5> Other functions: remote control for taking photos, searching for rings, gesture control, gaming, female cycle Note: 1. For best performance and accuracy, we recommend wearing the Smart Ring on your index finger. If you prefer other fingers, the middle and ring fingers are also OK. Avoid using fingers that are narrower than the knuckles at the base. 2. The size of Smart ring may not be completely in line with universal standards. Please measure your finger circumference before purchasing and make sure it fits comfortably, then choose the appropriate size. 3. How to start: Use the included charging cable or charging case to charge Smart Ring. The heart rate light will light up to indicate successful startup. Then you can use the APP Qring to connect the Smart Ring. 4. Some models have a protective film on the charging port. Please remove the protective film before charging.