Advanced Health Monitoring: Keep track of your health with our cutting-edge R02 Smart Ring. It offers comprehensive health tracking including heart rate, sleep analysis, and more, ensuring you stay on top of your wellness. Durable and Robust: this smart ring is designed to withstand the toughest conditions while maintaining a sleek and stylish look. Waterproof Excellence: With IP68 Waterproof, the R02 Smart Ring is your perfect companion for any adventure, capable of handling depths and conditions where others can't. Multi-Sport Functionality: Whether you're running, swimming, or cycling, the ring's multi-sport modes accurately track your activity, helping you achieve your fitness goals. Universal Compatibility: Seamlessly connect with both for Android and iOS devices, ensuring you're always connected, no matter your smartphone preference. APP:Qring Main control chip: RFO3 Bluetooth: 5.0 Battery capacity: 17mAh Waterproof grade: PI68 Charging method: Magnetic charging Colour:Tin Color Material:Stainless Steel Size:No.8 18.1mm Due to different batches, there may be differences in product printed text, which will not affect use Package Contents: 1x Smart Ring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.