JahyShow Waterproof DC/DC 24V (15V - 40V) Step-Down to 12V 10A 120W Car Power Supply Voltage Converter Regulator Electronic Transformer (Note:B01H8314J2 for Waterproof DC 36V (30V-50V) to DC 12V 10A 120W Car Power Supply Module Voltage Converter Regulator Electronic Transformer) Voltage reducer Waterproof IP68 Converter Regulator DC 24V(16V-40V DC) to DC 12V 10A 120W. to 12V, 10A, input DC 16-40V, 120W, made of first class aluminium. Compact and solid design, wiring diagram labeled on the back, easy to wire up, no humming or shutdown during using. Commonly used for radio, speaker system, club car, electric bike, solar panel, led lights an so on 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. Die-cast aluminum shell, anti-shock, and moisture-proof and has stronger durability.