... Battery: Build in Li-ion battery.l With Play & Stop button, easy to control Plug & play, no sync software needed, just drag and ... formats supported: MP3/WMA PC interface supported: USB 2.0 Play time: About 5 hours Battery tape/capacity: 3.7V 150mAH ... of earphone” 90°Operating instructions:Power on/off: press and Play for 3 secondsPlay/Pause: press PlayPrevious: press PRENext: Press NEXTVolume ...