8pcs LM2596 Buck Converter - Step Down Regulator 4.0-40V to 1.25-37V DC, 36V to 24V to 12V to 5V Power Supply Module with LED Display

High Efficiency: The LM2596 Buck Converter delivers stable output, with voltage conversion efficiency reaching up to 96%.
Output Voltage: 1.25V -37V (continuously adjustable; input voltage must be at least 1V higher than the output voltage).
Output Current: 2A (normal and steady), maximum 3A.
Wide Input Voltage Range: DC 0~40V. The digital display can be switched on or off to show either input or output voltage. Advanced voltage microprocessor with self-calibration; voltmeter error ± 0.1V (Note: to maintain voltmeter accuracy, ensure input voltage is above 4V).
Protection Functions: reverse voltage protection, over-temperature and short-circuit protection, making it considerably safer to use. Input and output connectors must not be reversed. A radiator is necessary for long-term operation above 2A/15W.
Wide Applications: suited for step-down uses where input voltage exceeds output voltage, such as batteries, power transformers, DIY adjustable voltage regulator power supplies, 24V vehicle power supplies, industrial equipment step-down, 12V to 3.3V, 12V to 5V, 24V to 5V, 24V to 12V, 36V to 24V, etc.
NOTE: For initial use, rotate the potentiometer counterclockwise more than 10 times. Press the button beside the voltmeter to check input or output voltage. Green LED lights up when testing output voltage; red LED lights up when testing input voltage