USB or Battery powered Mini Speaker 1)Operated by battery,USB or DC power 2)used for mp3,mp4,md, ... ipod,computer,mobile phone USB or Battery powered Mini Speaker used for mp3,mp4,md,ipod,computer,mobile ... "AA" batteries,USB or DC4V-6V.Power: 4WPacking: 1 pc/color box 30pcs/carton Carton size:61cmx51cmx46cm G.W.:14.4kgs ...