A tracker that can help you find energy, do what you like and feel the best. All you have to do is wear it. Apple iOS 15 or higher, Android OS 9 or higher. Move more: daily preparation score (1), activity division hours, all-day activity tracking and 24/7 heart rate, more than 20 exercise modes, automatic motion tracking and movement reminder. Stress-free: always online health tracking, daily stress management score, mindfulness training, relaxation breathing training, irregular heart rate notification (2), SpO2(3), menstrual health tracking, resting heart rate and high/low heart rate notification. Sleep better: automatic sleep tracking, personalized sleep profile (1), daily detailed sleep score, intelligent wake-up vibration alarm, sleep mode. Comfortable connection during day and night: call, SMS and smartphone application notification (4), color touch screen, customizable clock face, ultra-light weight and waterproof up to 50 meters, and battery life up to 10 days (5).