12V Power Supply, AC 110V 220V to DC 0-12V 40A 480W Buck Converter, Adjustable Variable LED Adapter Regulated 5V 6V 9V 12Volt Voltage Transformer 10A 20A 30A 40Amp Charger for Lab CCTV

[Volt Adjustment] Input voltage can be 110V or 220V.
Wide adjustable output voltage range: DC 0-12V. This supply is suitable for 3V, 5V, 6V, 9V, and 12V devices. The voltage precision is 0.1V.
Note: The maximum current is 40A, but the actual current depends on the load. No matter how the voltage is adjusted, the current is 40A and cannot be regulated. It can be used with devices of 5A, 10A, 20A, and 40A. Make sure to use devices that are below 40A. [Hardware] This Buck Converter is equipped with an LED screen, heat sink, and cooling fan. The LED screen can clearly display the output voltage. The heat sink and cooling fan help control the temperature within a safe range. When running power is high, the cooling fan will automatically activate with little noise. [Easy Operation] This supply requires no installation; after connecting the wire, it can be used to adjust output, which is convenient. The potentiometer is inset into the supply. Rotating the potentiometer adjusts the output parameter. [Protection] Over Load Protection, Over Voltage Protection, and Short Circuit Protection help protect your device from damage.
Note: The default input voltage is 220V; before use, switch the input voltage to 110V/220V according to your city voltage. [Wide Application] This power supply has variable application. It can be used as a 2V, 3V, 5V, 6V, or 12V 40A power supply for RV, Car, Laptop, Computer, Lab, CCTV, etc