2.0 channel card reader speaker system
with fm,mp3 decoder
work with all audio sources with a 3.5mm jack. 
support sd, mmc card, and usb flash driver
with li-on Battery inside
power supply: DC 5 Volt(li-lon Battery inside) USB power cord 
with remote control for operation convience
with volume control and power led indication and li-on battery charging indication 
good sound quality and competative exporting price.
a wide range of card reader speakers available for exporting,interested party please feel free to contact us