SMAKN&Acirc; DC-DC 12V to 9V 6A 54W Buck Power Converter/Step Down Power Supply Waterproof Input voltage: DC12V (Wide Voltage11.5V-28V). Output voltage: DC: 9V, output current: 6A,54W power. Please long-term work load at 5A (45W) within use. Slim volume: 43mm * 25mm * 22mm (L * W * H). Protection: Input instant high voltage, output over-current, output short circuit, chip overheating protection.