Specification: 1. For: MP3 player, Mp4 player, Portable CD player, PC, Cell Phone 2. Power Supply: 6* "AAA" battery or DC 9V adaptor (optional) 3. Power Output: 3W*2 4. Frequency Response: 200Hz-20KHz (+-3dB) Packing: 60pcs/ctn, outer carton size: 48*38*36cm, GW; 19kgs, NW: 18kgs Payment: 30% deposit, balance payment before shipment Shipment: prompt