This Audio Pipe DJAPB1580BT 15" 500 Watt PA Speaker With Handle And Wheels made of ABS plastic. It has a 2-Way configuration with an active filter and comes with a built in handle wheels for portability. The 15" woofer uses a 3" KSV voice coil with a 65 Oz magnet and the horn is made of a 4.5" Titanium driver. This unit is equipped with a Class D amplifier and has a USB Host/SD MP3 player. It also has a line output that allows for linking of additional powered cabinets. The rechargeable batteries are dual 12Volt / 12 Ah and this unit is 100V/220V switchable.