JahyShow Waterproof DC 36V (30V-50V) to DC 12V 10A 120W Car Power Supply Module Voltage Converter Regulator Electronic Transformer DC/DC Voltage Reducer Step Down Power Converter 36V to 12V, 10A, 120W, Made of first class aluminum waterproof housing makes the converter ideal for use in a wide range of applications including vehicles, security systems, hospital equipment, telecommunications etc, and Commonly used for radio, speaker system, club car, electric bike, solar panel, led lights an so on,Wide application: Used on golf cart,club car,motor, speaker, GPS, LED car display screen, air-conditioner, electric fan, solar energy, DVD, industrial equipment and other 12V devices Over 90% power conversion efficiency,With the protection of input momentary high voltage,output over current and short circuit,over heat.Protections: Over-load, Over-current, Over-temperature, Short-circuit, Over-voltage.Built-in over-voltage, under-voltage, overload, over-heat and short circuit protection Die-cast aluminum shell, anti-shock, and moisture-proof and has stronger durability. 100% waterproof (IP67) and shockproof, damp-proof and anti-dust, 90% of High Transfer Efficiency and stable performance Epoxy potting, seismic, water, moisture, dust, long term stable and reliable quality, small size, high efficiency, Easy Installation: There are 4 wires, Red wire is for the input +, Black wire is for the input - ; Yellow wire is for the output +, Black wire is for the output - Compact and Solid Design,Wiring diagram labeled on the back, easy to wire up, no humming or shutdown during using