Sound box speaker USB speaker Built-in lithium battery,rechargeable Applicable to SD card,USB,MMC card,Mobile,PC,MP3,MP4,ipod ... -Stereo sound,ultra-low sound powered from the phone.-Support USB,SD card,computer,mobile phone,IPOD,PSP,MP3,MP4 to listen to music ... watts20-20KH2>85dB1-2 hours4-5hours Packing:1pc/color box,80pcs/ctnMeas:51x40x42.5cmN.W./G.W.:25/26kgs Multifunction sound box speaker