... as a MP3 or CD player, etc. 10. It is powered by AC power adaptor. TECHNICAL SPECIFICATION: 1.Operating distance: 10 ... supply: USB port, Li-ion battery or DC 5VChina speaker/multimedia speaker supplier!Packing details: Carton size: 75*36*30cm QTY ... : specializes in developing ,designing and manufacturing of Headphone , Multimedia Speaker Consumer Electronic Products, with 500 workers at 5,000 square ...