Digital Boost Board 100W High Power Step-up Module Voltage Regulator Adjustable 4-35VDC To 5-45VDC Output 5A Digital Voltmeter ​This is a powerful boost module that is used when there is no suitable high voltage power supplys to suit the driving load. It has a voltage display function, it can display the input voltage or output voltage, just press the button to switch; it tests the voltage accuracy is quite high, it can also manually adjust the output voltage, (5V-45V) convenient and practical. Features: Using quality printed circuit board, wear-resistant and corrosion-resistant, with long durability. Digital programming design, precise control, used when there is no suitable high voltage power supplys to suit the driving load. You can use it to DIY a regulated power supplys, input voltage is 3V-35VDC, the output voltage can be adjusted from 5V-45VDC. With voltage display function, high precise voltage display, it can test the voltage with high accurate. Voltage switching display, the display shows the output voltage by default, you can press the voltage switching button to switch the display to show the input voltage. Output voltage adjustable, with a debuggable potentiometer, the output voltage can be adjusted by yourself to meet your demands. Suitable for electronic enthusiasts DIY and maintenance electrical equipment, digital products, etc.  Operating instructions: 1. Connect the input terminal to the power supplys, the applicable supplying voltage is 4-35V, pay attention to its positive and negative polarity. 2. Turn on the power switch and the screen will display the current output voltage after boosting. 3. If the output voltage is not enough to meet the working voltage of the load, the voltage can be adjusted by potentiometer. 4. Connect the output terminal to the load, paying attention to the positive and negative terminals between them. 5. Press the voltage toggle button to switch between displaying the output voltage and the input voltage. Specifications: Name: Boost Module Material: printed circuit board Input voltage: 4-35V Output voltage: 5-45V Input current: Max5A Max power: 100W Voltage control accuracy: 0.1V Item size: 72 * 48 * 18mm / 2.83 * 1.89 * 0.71in Item weight: 38g / 1.34ounce Package size: 80 * 50 * 25mm / 3.15 * 1.97 * 0.98in Package weight: 39g / 1.38ounce Packing List: 1 * Boost Module