1.Audio bass amplifier,saving energy; 2.With storable 3.5mm jack cable; 3.Ideal for gifts and promotional items; 4.OEM Minimum   order    quantity:50pcs/ctn      Battery:LithiumBattery/1pcs ,3.7V800mA,With FM Radio Functions  Charging Time:3Hr-5Hr          Output power :3W*2(RMS)               Output Impedance:4OHM          Power Supply:DC5V               Play Format for USB:MP1,MP2,MP3     Read Data Support Bitrate:32kbps-320kbps        Radio Frequency Range:88MHZ-108MHZ    Frequency Response:150hz-20khz

Portable Mini Amplifier