Bluetooth Smart Watch WristWatch for iOS Android OS Smartphones iPhone 4/4S/5/5S/6 Samsung S5/S4/S3/Note 3 HTC Huawei Xiaomi (U8 Black) This is a new Bluetooth Smart Watch U8 Wrist watch which is compatible with all Bluetooth V2.0 or above enabled smartphones, tablets and PCs (support Android 2.3 or above),such as iPhones 4, 4S, 5, 5S, 6s,6s plus,Sumsung S3, S4, Note 2, Note 3, Note 4,HTC,Huawei,xiaomi phones etc. U8 Bluetooth Hands-free Calls Android/IOS Smart Watch which features high technique and excellent performance.It is very convenient to use that you could operate your phone's main functions which are available on your wrist. With the U watch U8, you could easily answer or reject calls thanks to its intuitive side buttons and integrated speaker/microphone. What's more, if you phone moves out of range, it will vibrate indicating it is on the move which will ensure against theft or loss. This wonderful Bluetooth bracelet will be your good helper and companion. Note: Android System can support all function in the description But IOS only support: Pedometer, Calendar, Call Sync, Calculator, Clock, Stopwatch