1.factory support OEM&ODM 2.owned loudspeaker, wooden case factory 3.fashion design with CE,ISO9000 4.SD,USB,MP3 TL- ... .1 Speaker SystemSpecification:Output Power: (RMS)8W+3W*2Driver unit:3”*2+2.5”*2Frequency Response: 50Hz~18 KHzS/N Ratio ... *345 MM/6PCS20’/40’/40HQ: 1460/3025/3547pcs 2.1CH wooden case computer multimedia speaker with MP3,sd, usb