5pcs LED Display LM2596 Buck Converter - DC to DC Buck Converter Adjustable Voltage Regulator 4-40V to 1.25-37V

[Robust Protection] Built-in safeguards include reverse connection protection, overheating protection, and short-circuit protection, providing stable and reliable DC-DC step-down conversion. [DC Voltage Regulator Adjustable] Turn the potentiometer counterclockwise with a mini screwdriver to step down output voltage, and clockwise to step up. Please make sure the input voltage is at least 1.5V higher than the output voltage to ensure stable output. [Precision Calibration] Conserve power by turning off the display (long-press 1-4s); reactivate instantly with a short press. Achieve higher accuracy (± 0.5V adjustable range) via advanced calibration mode (long-press >4s) for both input and output voltages independently.

Settings are saved permanently. [Dual Voltage Monitoring & Display] Features a built-in voltmeter with ± 0.1V accuracy (4-40V range).
Note: The voltmeter activates only when input voltage exceeds 4V. Clearly indicates input (IN) or output (OUT) voltage via LED lights and digital display; toggles with a single button press. Remembers your last viewed setting after power cycles. [High-Efficiency 3A Output] Delivers a strong 3A continuous output current (recommended 2A for optimal thermals). Utilizes a 150kHz 2nd-gen switching regulator for minimal power loss and high conversion efficiency. Adequate heatsinking is advised for loads above 2A