Exercise Tracker Smart Ring - Design and function: double layer material with tight construction and a classic minimalist exterior that blends fashion and intelligence. It accurately tracks steps, distance, calories burned, and supports indoor/outdoor running, treadmill workouts, and fitness walking. - Smaller but more powerful: built-in high performance heart rate sensor with a green light allows quick heart rate and sleep measurements. The companion app can also measure heart rate for additional health insights. - Sleep tracking: automatically monitors sleep at night, records sleep duration, and analyzes sleep data including sleep depth. - Battery life and charging: battery capacity 18 mAh, typical use 5-7 days. Sealed design is waterproof and supports safe charging for longer service life. Built-in wireless charging chip. The charging compartment houses a battery that can store power and independently charge the device about five times when fully charged. Convenient to carry when going out. - Use scenarios: daily activity tracking to monitor steps and health trends; workouts including indoor/outdoor running and treadmill sessions; travel or on the go where the charging case provides extra power.