... screen. 4, Karaoke function VFD Display USB/SD Karaoke 2.1 Multimedia Speaker Description:1,With usb,sd card read function, play mp3 ... with PC, VCD, DVD, IPOD, MP3/4, directly and suitable to all the device of the audio frequency with output. Specificate ... :1,Output power:30W+10W*2(RMS)2,Speaker driver:woofer5.25inch,satellite3inch*23,frequancy response:40HZ-20KHZ4 ...