Description: 1. Equipped with a voltmeter display, the voltmeter has an error of ± 0.1V and a range of 0-45V. (Note: To ensure the accuracy of the voltmeter, please ensure that the input voltage is above 4V). 2. Tap the button to switch between measuring input or output voltage, with an indicator light showing which voltage is being measured, and maintain the last setting, even if the power is turned off and then turned on again. 3. The voltmeter can be turned off, and when not needed, the jumper cap of P3 can be removed to provide reverse protection. Reverse connection will not burn out. 4. With wiring terminals, it can be easily used without a soldering iron, and the soldering wire connection points are retained. 5. Adjustable output voltage range: 1.25V~37V, continuously adjustable. 6. The maximum output current can reach 3A, and the normal stable operating current is 2A. 7. Adopting an internal oscillation frequency of 150KHz, it belongs to the second-generation switching voltage regulator, with low power consumption and high efficiency. 8. It has overheat protection and short circuit protection functions. The green light indicates the output voltage The red light indicates the input voltage