💪📊 Health Guard Smart Ring 💍⭐⭐⭐⭐

    Description： Note: 1. For best performance and accuracy, we recommend wearing the Ring on your index finger. If you prefer other fingers, the middle and ring fingers are also OK. Avoid fingers where the base is narrower than the knuckle.2. The size of Xiaomi rings 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: Charge the Ring with the included charging cable. The heart rate light will light up to indicate successful startup. Then you can use the APP Qring to connect the Ring. Specification: Brand：Xiaomi Colour: Black, Gold (optional) Main functions: step count, distance, calorie count, heart rate, blood oxygen saturation, blood pressure, sleep tracking, multi-exercise mode Application: Qring Supported systems: for Android5.1 or higher, for IOS8.0 or higher Flash memory: Ram 208kb Rom 512kb Bt: 5.0 Bluetooth low energy chip compatible with Bluetooth Heart rate: Vcare VC30f Battery type: Lithium-ion polymer Capacity: 17mah Charging mode: magnetic charging Waterproof rating: 5ATM Charging time: Approximately 1 hour Battery life: 5-7 days, standby for 15 days Appearance material: stainless steel Size Diameter (MM): No.8 18.1mm/0.71in, No.9 18.9mm/0.74in, No.10 19.8mm/0.77in, No.11 20.6mm/0.80in, No.12 21.6mm/0.84in (optional) Weight: 4.4g Gross weight: 70g