Specifications: Bluetooth version: V4.1; Ambient Noise: 75dB; Transmitting Range: 10m; Talk Time: about 3 hours; Charging Time: about 1 hour; Music Play Time: about 6 hours; Standby Time: about 160 hours; Range of Frequency: 2.4GHz; spectrum Bluetooth Protocol: A2DP + HFP 1.5 + HS P 1.2; Size: 40 x 47 x 9.9mm; Watch band: 230mm; Touch screen: capacitive screen; Screen size: 1.5 inches; Battery capacity: 190mA; Language: 12 kinds (English, Chinese Simplified, Chinese Traditional, Korean, Russian, French, German, Spanish, Italian, Portuguese, Turkish, Japanese); Standby current: 300uA; Shutdown Current: 30uA; Screen resolution: 128 x 128 TFT; Application System: Android / IOS; Description: This is a new Bluetooth Smart U Watch U8 which is 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. Functions: Bluetooth phone / phone book / phone music sync / pedometer / alarm / step watch / anti-cell phone lost / remote camera / view SMS text messages and other QQ micro-channel (IOS does not support remote camera and viewing information)