2.0, SD, Pen Drive, 2.4GHz wireless, 3.5mm Aux in, RCA aux in, Made for iPhone/iPod/ ... streaming capabilities with the included USB wireless audio transmitter.Specification:Power output: RMS 6W*2Driver: 3'*2Frequency response: 60Hz - 20kHzSNR: >65 dbTHD ... : D100*W280*H110mmFeatures:2.0 flash reader speaker2.4 GHz wireless audio transmission with external dockingDecoding MP3 & WMA in SD card ...