Bluetooth Smart U Watch which is compatiblewith all Bluetooth V2.0 or above enabled smartphones, tablets and PCs (supportAndroid 2.3 or above),such as iPhone 4, 4S, 5, 5S, Samsung S3, S4, Note 2, Note 3, Note 4 etc. Features: 1.48"" Capacitive Touch Screen TFT LCD Time / Date / Week / Battery state display Ringing reminder when you receive a call Ringing reminder once your mobile phone disconnected Display the number or name of incoming calls Answer or Dial calls from your wrist Stopwatch function Support hands-free calls, phone book Play the music in your phone (after Bluetooth paring) Sync SMS/call history (only for android phone) Ring reminder when your Android 2.3 or above smart phonereceive a message (including Wechat,Facebook, Twitter, WhatsApp, Skype, and so on) Anti-lost alarm function: When cellphone left watch alarmautomatically, after a certain distance to avoid lose the phones Remote taking photo function: You can control your cellphoneto take photo from your wrist. (Only for android phone) Altitude Meter, Passometer , Photograph, Barometer,Vibration