The item is a professional and practical voltage regulator with 3- LED display, which is mainly made of durable hard PCB board and plastic materials, and features adjustable output voltage of DC 1.25V-37V. With easy and safe to use, it is really a wonderful adjustable voltage set down module for choice. Features - With voltage display function. - Button to measurement of the input or output voltage, and LED indicates the current measurement of the input or output voltage. - High efficiency, 150 kHz fixed frequency internal oscillator. - Thermal shutdown and current protection - The tube can be turned off by another button. - Mentioned in these states are able to be memorized, it will not be lost even if the power is disconnected. - Continuously adjustable output voltage range of 1.25V -37V, 4-40V input voltage range. (The input voltage is at least high than the output voltage of 1.5V) Specifications - Input voltage: 4-40V - Output voltage: 1.25V~37V (decompression mode, must be over 2V) - Output current: 2A continuous output - Output power: 15W MAX - The displayed accuracy: plusmn;0.05V - Display range: 0-40V. (Note: in order to make the voltage display more accurate, please ensure the input voltage higher than 4V) - Grain wave peak: 100 mv - Voltmeter precision: plusmn; 5 ; - Static power: 20 ma - Dimension: 7cm*4cm Package list: 2 * DC-DC 1.25-37V Adjustable Voltage Regulator Converter Module with LED Voltmeter