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.