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【Robust Protection】 Built-in safeguards include reverse connection protection, overheating protection, and short-circuit protection provide stable and reliable DC-DC step-down conversion.
【DC Voltage Regulator Adjustable】 Turn the potentiometer counterclockwise with a mini screwdriver and to step down output voltage, clockwise to step up. Please make sure the input voltage is at least 1.5V higher than 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: 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.

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Parameters:
Input voltage: 4-40V
Output voltage: 1.25-37V
Output current: 2A rated current and 3A Max
Internal vibration frequency: 150KHz
Adjustable buck converter: Turn the potentiometer counterclockwise with a mini screwdriver and to step down output voltage, clockwise to step up.
Calibration Mode (Long-press >4s):
Adjust input voltage measurement (±0.5V) while IN LED is lit.
Long-press >2s → switch to output calibration (OUT LED lit).
Long-press >2s again to save settings (stored permanently).
Power Off (Long-press 1-4s):
Turns off the voltmeter.
Short-press to power back on.
Protection:
Reverse Connection Protection
Overheating Protection
Short Circuit Protection

Note:
1.Please add heatsink when the output current is over 2A or output power is over 15W.
2.Please make sure the input voltage is at least 1.5V higher than output voltage to ensure stable output.

Package includes:
5 x LED display LM2596 buck converter

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