Highlights Activity record: to record your daily activity ( step pedometer, distance, calorie etc ) Heart Rate Function  Compatible OS Android 4.4 / iOS 7.1 and above system Notification Alerts: Alarm alert, call alert, sedentary alert, etc. by silent vibration Find my Phone:during the location of the phone, the ring tone will ring automatically Anti-theft of the phone: The smart bracelet will remind you with vibration when cellphone is beyond 5 meters range Remote camera: take photos by phone through remote control of the  bracelet Sleep Monitoring Pedometer Distance Calories activity time Alarm Alert Call Alert SMS Alert Sedentary Alert Remote Camera Shoot Find my Phone Anti-theft Alert Device date storage:the Date will be cleared at 12 O' clock of the night as a cycle,but the  device itself could restore 7 days' date,after 7 days,the date will be cleared,We suggest user to sync date with app at least one time within 7 days during use. Specifications: CPU:Nordic Sensor:Kionix Screen Size:0.8"OLED attery capacity：50mAh Host Weight：18g Bluetooth：BLE4.0 Operating temperature: -10 ℃ -45 ℃   Waterproof grade: Life waterproof Standby time：More than 7days Waterproof level:IP67 Bluetooth:4.0 Note： Heart rate date connect be used as medical date,only to do the auxiliary reference. If you wear it and are felling uncomfortable,please stop use it immediately.