Tap the side buttons to cycle through time, steps, heart rate, and battery. Biosensors track heart rate, blood oxygen, and sleep. Double-tap to switch videos, music, or e-books, or control your phone camera. Record steps, calories, and exercise modes with daily to monthly charts. Includes a wireless charging case, 5ATM water resistance, and app control for ring brightness. Ideal for health, fitness, sleep, photos, and music.