Volume control Out put power: 1W + 1W Frequency response: 200Hz-12KHz Speaker: 50mm speaker .4.Ohms Signal cable: 22crn STR.CORD Battery: AAA X4 Batteries DC adapter:output 6V,350mA USB Power cord Plug: Stereo 3.5 mm Compatible: MP3 Cell Phone,MP3/MP4 Player/CD Player/Notebook /PC Products size: 11 x 7 CM Plastic size: 25x 18CM