DC Buck Converters LM2596 2.5-40V to 1.25-37V 3A Blue with LED Display Pack of 2

What is this?
This DC-DC buck converter can be used in the buck field where the input voltage is higher than the output voltage, such as power transformers, DIY adjustable regulator power supplies, and industrial equipment voltage adjustment, etc.

What will I get?
Overall Size: 65x38mm/2.6x1.5 inch(L*W);
Input Voltage: 2.5-40V;
Output Voltage:1.25-37V;
Maximum output current: 3A;
Model: LM2596;
Transfer Efficiency: 92%;
In the package of: 2pcs x voltage regulators with LED display.

Are there any advantages of the product?
1.The voltage regulator with voltmeter display(voltmeter error ±0.1V, range 4 ~ 40V) and terminal blocks, is easy to use without a soldering iron.
2.The internal oscillation frequency of 150KHz is adopted, which belongs to the second generation switching voltage regulator, low power consumption and high efficiency.
3.The input end is protected by two tubes(overheat protection and short circuit protection), and the reverse connection will not burn the module(please strengthen heat dissipation if more than 15W).

How to use it?
To calibrate input terminal: long press the switch for 4 seconds, release the hand and the IN light will be on, short press the button to change the original value 0.0V, a positive number means upward calibration, and a negative number means downward calibration.
Press and hold the button for 2 seconds, the adjustment method of output terminal calibration is the same as above.
To turn off voltmeter, long press the switch for more than 1 second and less than 4 seconds, and release it to turn off. Then, short press the switch will turn it on(the last setting will not be changed).

What should I notice?
When 2.5-4V is input, the module may not work and the digital tube may not display.

Brand	uxcell
MPN	Does Not Apply
Net Weight	0.043