SMAKN&reg; 12A CAR Cigarette Lighter Power Supply Adapter 5.5 * 2.1 mm Plug 16awg 12v Dc Output Output Power: 12A (max) Input Power: 12V DC Wire: 16AWG (American Standard) Plug size: 5.5mm OD - 2.1mm ID - Length 10mm barrel Plug polarity: Inside positive - Outside negative