Features: Ultra-wide voltmeter range, DC 4.5~40V, 2.5V/2A output current capability. With terminal block for easy access to the line, the operation method is simple. With USB power indicator, high efficiency, low ripple, powerful. The on-board voltmeter can be self-calibrated and there will never be an inaccuracy in the voltmeter. With reverse connection protection, reverse connection does not burn, over-current, over-temperature protection, you can use it safely and safely. One button ("output enable" button) switches the USB output, one button ("low power" button) enters ultra-low power consumption, and is more convenient to use. Specifications: Condition: 100% Brand New Material: Electronic Components Voltmeter range: DC 4.5~40V Output current: 5V/2A Package list: 1 * Step-Down Module Note: The input voltage is 6.5~40V to stably output 5.0V. 1、Ultra-wide voltmeter range, DC 4.5~40V, 2.5V/2A output current capability 2、With terminal block for easy access to the line, the operation method is simple 3、With USB power indicator, high efficiency, low ripple, powerful 4、The on-board voltmeter can be self-calibrated and there will never be an inaccuracy in the voltmeter 5、With reverse connection protection, reverse connection does not burn, over-current, over-temperature protection, you can use it safely and safely