SAMAZ 2014 Fashion Bluetooth Smart Watch WristWatch U8 UWatch Phone Mate for Smartphones IOS Android Apple iphone 4/4S/5/5C/5S Samsung S2/S3/S4/Note 2/Note 3 HTC Sony Blackberry (White) Warmly remind: android System can support all functions in the description; For Iphone IOS system only support Passometer,Calendar,Call Sync,Calculator,Clock,Stopwatch Dial Size: 4.6 x 4.2 x 1cm / 1.81 x 1.65 x 0.39 inch Material: Steel + Silicon Sync SMS/call history(only for android phone, you need download apk) Ring reminder when your smart phone receive a message (including Wechat, Facebook, Twitter, WhatsApp, Skype, and so on. Only for android phone.) Compatible with all Bluetooth V2.0 or above enabled smartphones, tablets and PCs (support Android 2.3 or above),such as iPhone 4, 4S, 5, 5S, Sumsung S3, S4, Note 2, Note 3, Note 4 etc