... from MP3, MP4, PC, Notebook, for loptop,, etc.Supports USB2.0 high speed transmission, fully compatible with USBSupports the calendar, time ... =10%Speaker Power4Ω/3W*2Frequency Response200Hz---16KHzSignal-to-Noise>80dbDistortion<0.5%BatteryExternal lithium Rechargeable BL-5C Li-Battery (2200MA)FM ... Co., Ltd Mobile Phone: 0086-13632831991Tel:0086-755-36624877 2.0 Mini Loudspeakers