Acamar V3.0 Touch Screen Smart wristwatch Bracelet for Google Android Mobile Phone, Iphone, Microsoft Windows Phone System, Nokia Symbian Black 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 1.44 inch touch screen LCD,Come with 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.