Elegant Design: The R18 smart ring features exquisite enamel craftsmanship, combining style with functionality in a sleek, waterproof design. Comprehensive Health Monitoring: Tracks heart rate, blood oxygen, exercise, and sleep patterns, providing real-time insights into your overall well-being. Multi-Sport Modes: Supports various activities including running, cycling, jump rope, hiking, yoga, golf, and dance, recording exercise data in real-time. Long Battery Life: Enjoy 3-5 days of active use or 7-10 days on standby, with a convenient magnetic charging case for easy power replenishment. Smart Features: Remote camera control function allows you to capture photos by shaking the ring, adding convenience to your photography. Durable Construction: Made with epoxy resin and stainless steel, featuring a beautiful enamel surface for both aesthetics and durability. Specifications: Basic Parameters: Ring Internal Diameter: 6 16.5mm, 7 17.3mm, 8 18.1mm, 9 18.9mm, 10 19.8mm, 11 20.6mm, 12 21.4mm, 13 22.2mm Weight: 3.0~4.0g Main Functions: Steps, distance, calorie counting, heart rate, blood oxygen, sleep monitoring, remote camera Chipset: AC6323 APP: Smart Health Compatible Systems: Android 5.1 or above, iOS 8.0 or above RAM Memory: 4MB Screen: Not supported Connection: Bluetooth V5.0 Sensors: SC7A20H, Goodix GH3018 (heart rate) Battery: Lithium Polymer, Ring: 20mAh, Charging Case: 400mAh Charging Method: Magnetic Charging Charging Time: Around 1-2 hours Battery Life: 3-5 days active use, 7-10 days standby Waterproof Rating: IP68 Material: Epoxy Resin + Stainless Steel (Color Enamels) Package Included: 1 x Smart Ring 1 x Charging Case 1 x Charging Cable 1 x English Instruction Manual