1.full frequency speaker-15" 2.Output:90W 3.Battery5.5Ah 4.Support USB,SD card,MP3 input 5.telescoping handle&Caster Wheel ... .2.Integrated retractable handle and wheels for easy carring.4.with USB /SD Jack, can read and play song.5.Digital ... instruction,power cord,wireless microphone, wireless earphone,remote control,AV cable Hot Selling 15inch 90W Black Portable PA system with USB,SD reader,Mics ...