Pyle - 18-Amp DC Power Supply • Input: 115V AC, 60Hz, 450 watts • Output: 13.8V DC • 18-Amp constant and 20-Amp surge • Built-in cooling fan • Current meter • Powers cellular phones, 12V DC CB radios, scanners, HAM radios, autosound system, ETC. • Screw terminal connectors • Electronic overload protection with auto reset • Short circuit and thermal protection • Crowbar over: voltage protection • Fuse protected • 11 7/16" W x 9 7/16'' H x 4 7/16'' D