Comprehensive Health Tracking: Monitor your body closely with features like heart rate sensing, SpO2 monitoring for blood oxygen, and stress monitoring. It also includes sleep tracking and HRV analysis to help you understand your rest and recovery better Long Lasting Battery: The device is powered by a 110mAh battery that provides a working time of 7 to 10 days. It has a standby time of up to 30 days and recharges fully in just 1 hour Advanced Bluetooth V6.0: Experience fast and stable connections with the latest Bluetooth V6.0 BLE technology. This ensures your fitness data syncs quickly with your phone and you receive smart call alerts instantly 5ATM Waterproof Design: Designed for active lifestyles, this fitness band has a 5ATM waterproof rating. You can wear it confidently during workouts, in the rain, or while swimming without damaging the device Smart App Control: Easily manage your settings and view detailed health reports using the "QRing Health & Fitness" app available on the App Store and Google Play. The band also features a "Find Device Via App" function to help you locate your phone Lightweight and Comfortable: Weighing only 20g with a soft nylon wristband, this fitness tracker is designed for maximum comfort. It fits wrists perfectly with dimensions of 43.2 x 28 x 8.7mm, making it suitable for all-day wear