Features: brand new and high quality With voltmeter display, advanced microprocessor, voltmeter error 0.05V, range 0~40V. (Note: To ensure the accuracy of the voltmeter, please ensure that the input voltage is above 4V) Touch the button to switch between measuring input or output voltage, and there is an indicator light to show which voltage is being measured, and the setting is saved, even if the power is turned off and on again The voltmeter can be turned off, and it can be easily realized by tapping the button on the left when it is not needed With terminal blocks, it is convenient to use without soldering iron, and the connection points of welding wires are reservedInput voltage 4.0~40V (The input voltage must be higher than the output voltage by more than 1.5V.) Adjustable output voltage range 1.25V37V continuously adjustable (input voltage must be 1.5V higher than output voltage)Its large output current can be as high as 3A, and the normal stable working current is 2A Using an internal oscillation frequency of 150KHz, it belongs to the second-generation switching voltage regulator with low power consumption and high efficiency. With overheating for protection and short circuit for protection function Specifications: Material:ABS Size: Approx.5.6X3.5cm/2.20X1.38inch Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1PCXLM2596 Power Moudle