【Main selling point】 5ATM&IP69K waterproof, and obtained IP69K certification 380mAh big battery, standby time above 50days, daily using time above 15days The latest HRS3690 heart rate sensor, the acc more→uracy of the heart rate test is comparable to that of Apple and Huawei Newly designed dynamic UI, support split-screen display 1.71-inch clear display, resolution 280*320, give you a better visual experience Screen Diagonal: 1.71" Waterproof Rating: IP68 Heart Rate: Yes Pedometer: Yes Calorie Counter: Yes Compatibility: Android 5.4 , IOS 8.0 ?【Multifunctional Military Smartwatch】 Smart Notifications for incoming calls, text messages of Apps (WeChat, QQ, Weibo, Twitter, WhatsApp, Line,