Morelian B0FW3XW2CT - 7 ID: 17.3mm/0.68in, Circumference: 54.3mm/2.14in

[All-weather Performance] : Professionally tested for water immersion up to 1.5 meters (4.9ft) for 30 minutes, making it suitable for various scenarios like swimming or hand washing. [Advanced Health Tracking] : high accuracy optical sensor monitors step count, calorie consumption, distance, sleep, and body temperature data in real-time via a mobile app. [Ultra Thin and Lightweight Design] : Ergonomically designed for all-day comfort with a touch of fashion, seamlessly integrates into your daily wear or workouts. [Exercise Efficiency] : Synchronize steps and health data during exercise to help plan your fitness goals scientifically through precise movement analysis. [ Control & Remote Camera] : Easily beautiful moments with a double tap ring remote control photo function, and enjoy hands-​k>​ reading, video browsing, and more. Spec: Item Type: Smart Ring Material: Stainless Steel Battery Type: Li Battery (Built in) Battery Capacity: 18mAh ​​ Version: 5.1 ​​ Range: 3-5m / 9.8-16.4ft Water Proof Level: IP68 Color: Rose Gold Package List: 1 x Smart Ring 1 x Charging Cable 1 x Instruction Manual How To Use: Just download the app first and then connect it. The ring turns on automatically when fully charged.