This is a new Bluetooth Smart U Watch which is compatible with all BluetoothV2.0 or above enabled smartphones, tablets and PCs (support Android 2.3 orabove),such as iPhone 4, 4S, 5, 5S, Sumsung S3, S4, Note 2, Note 3, Note 4 etc. 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 Play the music in your phone (after Bluetooth paring) Sync phone book/SMS/call history(only for android phone) Ring reminder when your Android 2.3 or above smart phone receive a message Anti-lost alarm function: When cellphone left watch alarm automatically, after a certain distance to avoid lose the phones Material : Steel + Silicon Bluetooth Version : Bluetooth 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 Language Support:version: English, French, Spanish, Portuguese,, Italian,German, Turkish, Russian, Dutch 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