This is a new Bluetooth Smart U8 Watch which is compatible with all Bluetooth V2.0 or above enabled smartphones, tablets and PCs (support Android 2.3 or above), such as Sumsung 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 watch Support hands-free calls, phone book Play the music in your phone 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.) Anti-lost alarm function: When cellphone left watch alarm automatically, after a certain distance to avoid lose the phones Remote taking photo function: You can control your cellphone to take photo from the watch.(only for android phone) Stopwatch, Altitude Meter, Passometer, Photograph, Barometer, Vibration Bluetooth Version: V3.0+EDR Bluetooth Protocol: A2DP + HFP 1.5 + HS P 1.2 Range of Frequency: 2.4GHz spectrum Ambient Noise: ?75dB Transmitting Range: ?10m.Charging Time: about 1 hour Talk Time: about 3 hours Music Play Time: about 6 hours Standby Time: about 160 hours Power Supply: Built-in 230mAh rechargeable battery.