SMAKN&reg; DC-DC 12V to 3.3V 6A 20W Buck Power Converter / Step Down Power Supply Waterproof Input voltage: DC12V (Wide Voltage 6V-28V). Output voltage: DC: 3.3V, output current: 6A, 20W power. Please long-term work load at 5A (17W) within use. Slim volume: 43mm * 25mm * 22mm (L * W * H). Protection: Input instant high voltage, output over-current, output short circuit, chip overheating protection.