... 4.Support USB,SD card,MP3 input 5.telescoping handle&Caster Wheel Features:1.This portable Public Address ... handle and wheels for easy carring.4.with USB /SD Jack, can read and play song ... 3“*1Resistence8 OHMMeterialWood/metalConnectorWith 5.5Ah battery , USB / SD card reader ,digitalMP3 inputCompetible format dvd,svcd,MP3,MP4, ... Hot Selling 15inch 90W Black Portable PA system with USB,SD reader,Mics