This is Audio Pipe's DJAPD1550UB Dual 15" 800 Watt PA Speaker made of ABS plastic. It has a 2-Way configuration with an active filter and comes with a built-in handle and wheels for portability. The two 15" woofers use a 2.5" KSV voice coil with a 50 oz. magnet, and the horn is made of a 4.5" Titanium driver. This unit is equipped with a Class A/B 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.