... 1.support TF, U-disk,USB 2.FM radio recorder 3.earphone function 4 ... MP4, PC, Notebook, for loptop,, etc.Supports USB2.0 high speed transmission, fully compatible with USBSupports the calendar, ... Power4Ω/3W*2Frequency Response200Hz---16KHzSignal-to-Noise>80dbDistortion<0.5%BatteryExternal lithium Rechargeable BL-5C Li-Battery ... Mobile Phone: 0086-13632831991Tel:0086-755-36624877 2.0 Mini Loudspeakers