1.full frequency speaker-15" 2.Output:90W 3.Battery5.5Ah 4.Support USB,SD card,MP3 input 5.telescoping handle&Caster Wheel Features:1.This portable Public Address System can be used either indoors or outdoors at any demanding venue.2.Integrated retractable handle and wheels for easy carring.4.with USB /SD Jack, can read and play song.5.Digital microphone input6.Digital MP3 input7.Built-in 5.5Ah ...