2.1 Audio speaker 1. USB/SD WMA,PM3,MP4/5 ... +10W*2 Hot Selling USB/ SD 2.1CH audio speaker systemFeatures:1,USB/SD card support mp3/4/5 ... ,Connect with TV directly, or any other device of the audio frequency with output. 5, Key button with remote ... 1,Output power:30W+10W*2(RMS)2,Speaker driver:woofer5.25inch,satellite3inch*53,Frequancy response:40HZ- ... HQ Hot Selling USB/ SD 2.1CH audio speaker system