Acamar Bluetooth3.0 Smart Watch Wrist Watch U8 Watch for IOS iphone Android Samsung Galaxy HTC LG White This is a new Bluetooth Smart U Watch compatible with all Bluetooth V2.0 or above enabled smartphones, tablets and PCs,such as Iphone/Samsung/LG/HTC etc. Talk Time3 hours,Standy-by time about 160 hours,Built-in 230mAh rechargeable battery,Two-year warranty 1.44" Capacitive Touch Screen TFT LCD,Free gift of a watch dustcloth and a phone stand(Color randomization) Remind you to stand up, physical activity. Remind that you need to drink more water. Ring reminder when your smart phone receive a message If it use for android Device ,can down the app and fit all the functions. If IOS Device(iPhone4/5/6) can not download the APP and only support these function: Pressure gauge, Calendar, Calling, Calculator, Clock, Stopwatch.