Fitness Tracker HR, Activity Tracker Watch with Heart Rate Sleep Monitor Waterproof USB Charging Smart Bracelet with Step Counter Calorie Counter Pedometer Watch for Androin iOS Phone Kids Women Men [LAST DESIGN]: Fitness tracker with 0.96 inch TFT color screen offers excellent HD image quality, under the sun could see the screen clearly . Slim and lightweight body ,wrist sense design, cable-free charging with built-in USB plug, all to make your life easier. After charged for 1.5h, the 65mAh battery can work for 2-4 days. [ALL-DAY ACTIVITIES TRACKER]: The activity Tracker with updated functions and higher quality tracks your daily data accurately wherever and whenever. Monitors real-time heart rate automatically, sleeping quality, sedentary alert, pedometer, and calorie burned, helping you adjust yourself for a healthier lifestyle. [NEVER MISS ANY MESSAGE]: Smart bracelet vibrates when there is incoming a call. Receive SMS and SNS notifications from Facebook, Twitter, WhatsApp,Wechat and so on at a glance when phone is nearby . [BASIC FUNCTIONS]: shake for selfie/Find phone/Alarm clock/ calendar/Drinking reminder/smart anti-lost/ .Multiple functions enrich you and your family life! [WIDER COMPATIBILITY]: Easy to change the strap. The length of activity tracker is 5 to 8 inches. App supports most smart phones with Bluetooth 4.0 or above(not for tablet). Support system: iOS 8.0 or above(not for iPad),Android 4.5 or above.Search Lefun Health APP on Google Play (Android users) or App Store (iOS users)