AGPtEK Bluetooth Mp3 Watch Player with Touch Screen, 8 GB Storage Supports Up to 32GB SD Card, Black Bluetooth function: allows to play music through a connected BT device, providing an excellent sound and well optimized equalizer for music genres it supports Up to 10 hours music playing back. Built in 210mAh rechargeable Li-ion battery for only 2 hours charging time, providing a good battery life. The battery time may shorten while keep using BT function Audio formats supported: MP3, WMA, WMA, APE, FLAC, WAV; Video formats supported: AMV, AVI; Image formats supported: JPG /GIF/BMP Multifunctional designed with FM radio, Stopwatch function, video playing, E-book reading, Pedometer etc. Please note that FM radio can be played with wired headset only Please note that playlist is not supported at Bluetooth status. Whlie using Bluetooth, other applications may not available.