DROK DC-DC Buck Converter Regulator 4-38V to 1.25-36V 5V/12V Power Supply Module 5A, LED Voltmeter Display Module Properties: non-isolated step-down module (BUCK) Input voltage: DC 4-38V; Output voltage:DC 1.25-36V continuously adjustable Output current :0-5A (recommended for use within 4.5A) Output power: recommended for use in below 75W, more than 50W please add heat sink. overheat protection and short circuit protection;Dimensions: 6.6 * 3.9 * 1.8cm