Internal Power SuppliesInput voltage: 36/48/60/72VOutput voltage: 12VOutput current: 10/15/20APower:180WWith short circuit, overcurrent, overvoltage protection and many other functions, to prevent damage during use.Wiring: Red --36/48 / 60/72(input - Battery +)Yellow --12V (output --LED +)Black - ground (sharing a common thread - Battery -)Wiring simplistic explanation: The red line converter connected to the battery's positive line, the yellow line converter connected devices: negative line (such as lights, speakers, stereo) the positive line, then the battery's negative cable and equipment are connected to the converter black lines (black lines so called common line) Please be careful not to pick the wrong line, wrong immediately burned, there is no second chance, oh.Third, the product Features:1. Temperature protection: limit the output when the temperature rises, to ensure reliable operation of the product within a suitable temperature range. Effectively extending the life of the product.2, short circuit protection: output short circuit, this product will not be damaged. Short-circuit protection. Most of the products currently on the market without short-circuit protection, low quality.3, can be loaded with low-voltage start, constant output.4, has a waterproof capability.Packing include:1*