... √ TIF Card play× FM Function√ DC power socket√ Li-ion battery√ LCD Function× Clock× Alarm× Show Lyrics× Technical details : ... Power supplier:3.7V/1000MA USB/Li-ion battery.Output:RMS 3W THD=10%Frequency:150Hz-18KHzSenstitivity:Above ... , scalable high-quality mini series. 2). Built-in rechargeable lithium ion battery, rechargeable through the USB interface, 3). Compatible mobile phone, ...