【Multi-Function】Enhanced version of S3 smart watch, Synchronization of date and time, weather forecast, music control, distance monitor, notifications, camera remote control, anti-loss alert, find mobile, sports and health record; incoming call and SMS reminder, social software, message reminder, sedentary reminder 【Heart rate and sleep monitoring】This fitness tracker monitors dynamic heart rate , uploading the real time data of heartbeats to phone app "Smart Wristband".Need to download the app and connect the phone to the phone via the app. Also support automatic sleep monitoring , it records deep , light , awake time and whole sleep time . All health data show as a chart , clearly acknowledge your physical fitness status at whole day.Data cannot be used as a medical reference. 【Feature】Not need to move off when you use the water in the daily life , such as wash hand , washing face or raining , because of its waterproof IP67. Please do not use it in diving,sea water (salt water) or hot water (40 °C / 104 °F or above), otherwise it may cause watch defects.