Sleep quality monitoring intuitively detects and records your sleeping quality including duration of sleep, various stages of deep or light sleep, REM2, awake time, and afternoon naps The Orafit app interprets your personal data to offer a more detailed analysis for each night Large 1.55” touch-screen display with 320x360 pixel resolution. the Mega’s large HD display provides a better viewing experience for all your notifications as well as a more responsive touch and smoother effortless operation Track your health 24/7 with blood-oxygen measurement1 and heart-rate monitoring1.Be smart and keep a close eye on your blood-oxygen level and heart rate to avoid any potential health problems. The built-in PPG sensor works around the clock to monitor your real-time heartbeat, and the built-in alarm alerts you immediately if any data goes above or below your normal level to ensure your physical state is in balance at all times.Also have 14 Sports Modes to level up your performance.Choose from 14 sport modes for improved accuracy when it comes to recording your steps, distance, pressure, time, heart rate, calories burned and other key statistics 5 ATM water-resistance 2 gives the freedom to enjoy hassle free aquatic sports.Move through your day without a single worry with 5 ATM water-resistance protection. Swim or surf with the Mega so your fitness activities and health conditions are continuously monitored even in water Long - lasting battery for staying connected to what matters.The battery lasts up to a 7 days with daily usage and can be fully recharged in 2 hours. It will be back on your wrist to keep track of all your activities and stay on top of all your health notifications