... controlCan read TF cardBuilt-in rechargeable Li-ion Battery.Audio Source: PC,MP3,MP4,MID,CD,DVD,Mobile phone ... put it on hard surface upward ,and let the pedestaltouch the surface tightly.Technical Parameter Input DC Voltage: DC ... Maximum output power:5W Frequency Range:80Hz-18000 Hz Power Source:PC, MP3, MP4, MD, CD, DVD player ... .:0.353KG G.W.:0.418KGThe size of the carton:45.5*41*37.2CM60pcs/CartonN.W ...