ITEM NAME:5A 75W DC-DC Adjustable Adapter Power Supply Module Voltmeter Module feature and performance: 5A high-power and high efficiency reduction voltage and low High quality and good performance With power light and voltage display with self-correcting. Adopting advanced voltage microprocessor, and the voltmeter error  ±0.1V, measuring range is 0~40V (Note: Please make sure input voltage more than 3.5V to make the voltmeter normal working) Touch the button to change input or output voltage, LED indicator light display is measuring voltage, and can autosave which one voltage, keep pressing the key can turn off the voltmeter Input voltage 4.0ï ½Å¾38V (the input voltage must be higher 1.5V than output voltage) Adjustable output voltage range: 1.25Vï ½Å¾36V  (the input voltage must be higher 1.5V than output voltage) Output power can reach 75W. Output current can reach 5A, suggested use it less than 4.5A (note: Please add a cooling fin into power chip, if you use it with high-power) High conversion efficiency, can reach 96% (It is related to input, output voltage, current, differential pressure) Load regulation Sï ¼Ë†Iï ¼â€°Ã¢â€° ¤0.8%, voltage regulation Sï ¼Ë†uï ¼â€°Ã¢â€° ¤0.8% With overheating protection and short-circuit protection Size: Approx. 66 x 40 x 12MM / 2.6 x 1.57 x 0.47 inch Applied range: This module can be use in field of input voltage higher than output voltage, like storage battery, power transformer, DIY adjustable stabilized voltage supply, 24V vehicle-mounted notebook power supply, reduction voltage of commercial unit, 12V to 3.3V, 12V to 5V, 24V to 12V, 36V to 24V etc Package Includes: 1 x DC-DC Power Module.Output power can reach 75W. Module feature and performance.