USB or Battery powered Mini Speaker 1)Operated by battery,USB or DC power 2)used ... ,md,ipod,computer,mobile phone USB or Battery powered Mini Speaker used for mp3,mp4,md,ipod,computer,mobile phone etc ... 4x"AA" batteries,USB or DC4V-6V.Power: 4WPacking: 1 pc/color box 30pcs/carton Carton size:61cmx51cmx46cm G.W.:14 ...