DC 12V to DC 24V Step Up Converter. (9-20V Wide Range Input) Max Current 5A 120W. Waterproof housing makes the converter ideal for use in a wide range of applications including vehicles, security systems, hospital equipment, telecommunications etc Built-in over-voltage, under-voltage, overload, over-heat and short circuit protection The length of the line is about 12CM, slim, small volume, easy installation. High quality and performance. 3 Year Warranty.