Adjustable voltage regulator has a large heat sink and cooling fan, and it starts to work when the current is greater than 3A, or the power is greater than 20W, or the temperature is greater than 40C Adjustable voltage regulator can be connected to solar battery to output stable voltage The high-power power module can step up or step down, the output voltage is adjustable from 0.5-30V, the current is adjustable from 0-6A, and the output power can reach 60W Long-handled potentiometer adjusts voltage and current, easy to operate, no screwdriver needed Step down module can be used as an ordinary buck-boost module with over-current protection capability, and can also be used as a battery charger and high-power LED constant-current drive module Description Adjustable voltage regulator has multiple safety protections: 1.The input can be reversed, and the reverse connection will not burn the circuit; 2.The output end is anti-reverse, and can be directly connected to the battery; 3.Short circuit protection, can be directly short-circuited output; 4.Temperature, power, overcurrent protection, so You are very safe and safe in use. Features Adjustable voltage regulator -Color: As shown. -Material: ABS. -Size: 7.2x5.8x5.2 cm/2.83x2.28x2.05 inch. Button control output ON/OFF state, you can set the power-on default to ON or OFF Package Including 1 * Adjustable voltage regulator