Features: 1. Unique appearance: The stainless steel exterior exudes confidence and personality, while the low allergenic epoxy interior adds comfort and fashion to it. 2. Application Connection: Connect via Bluetooth to view real-time data on mobile applications. The ring independently records vital signs and updates the application when connected. 3. Multi functional activity support: Supports walking, running, cycling, and GPS tracking. View exercise data in the application, such as duration, distance, heart rate changes, and calories burned. 4. Continuous monitoring: Track your vital signs 24/7 to ensure that you are aware of your health status at all times. 5. Durable design: This ring has an IP68 protection level, fully waterproof, suitable for swimming, hand washing, and rainy days, meeting all your waterproof needs. Specifications: Size and Model: 8/ 10/ 12 8: Diameter=18.1mm; Perimeter=56.9mm 10: Diameter=19.8mm; Perimeter=62.1mm 12: Diameter=21.8mm; Perimeter=67.2mm Battery capacity: 20mAh Waterproof grade: IP68 Charging method: Magnetic charging Package Include: 1x Smart Ring 1x charging cable 1x User Manual