This is a waterproof DC-DC converter. With 15-40V DC input, it converts to 12V @ 10A which is an ideal supply for embedded PC and robots. Features Overvoltage protection Overcurrent protection Overheat protection Short-circuit protection Waterproof and shockproof case High efficiency and less heat Specification Input Rage: 15-40V DC Output: 12V DC Output Current: 10A Size: 74 X 74 X 32mm (2.91×2.91×1.26\”) Efficiency: 90% Weight: 0.28Kg Maximum working temperature: 80 Shipping List 120W DC-DC Converter(FIT0170) x1