Sleep and heart rate monitor: the smart watch has a built-in optical sensor that can not only monitor your heart rate and blood pressure in real time 24 hours a day, but you can also automatically track your sleep and analyse the quality of deep sleep and light sleep. When you use this smartwatch, it can show your health anytime and anywhere.Phone / SMS notification: Connect the smart watch to your mobile app via Bluetooth to receive notifications via phone / SMS / SNS (QQ / Skype / Facebook / Twitter / Line / WhatsApp etc.). When your phone receives a call, SMS text messages and SNS, it vibrates to notify you so you don't miss a call or message. You can also search the contents of the SMS directly on the watch, as well as the name and number of the callers.Multiple sports and shared GPS modes: manually start tracking a specific activity (running, cycling, yoga, etc.), then set a target and track your stats in real time. Show your speed, distance, calories and a route map when running or cycling by connecting to your smartphone's GPS. Whether in the garden or in the gym, you can easily enjoy the stopwatch function directly on your wrist.Compatible with Android / iOS - This smart watch is compatible with Android and iOS phones. Compatible system: iOS 8.2 or above, Android 4.4 or above. (Not for iPad/PC devices) Turn on the Bluetooth of the phone and connect to the smart watch via the app.