... source from MP3, MP4, PC, Notebook, for loptop,, etc.Supports USB2.0 high speed transmission, fully compatible with USBSupports the calendar, time ... , THD=10%Speaker Power2Ω/5WFrequency Response200Hz---16KHzSignal-to-Noise>80dbDistortion<0.5%BatteryExternal lithium Rechargeable BL-5C Li-Battery (2200MA)FM ...