Versatile Application: perfect for a broad range of uses, this boost converter efficiently steps up from 4.0-35V to 5-45V. It's perfect for powering electric equipment, digital products, and more, ensuring reliable performance for your devices. Convenient Design: Featuring easy-to-access screw terminals for quick wiring, along with a built-in heat sink, this boost converter facilitates enhanced heat dissipation and simple setup, making it user-friendly and efficient for all users. Instructions for use: 1: Connect the power supply (4-35V), the input indicator light, the module is working properly . 2: Adjust the blue potentiometer knob, Clockwise, step up , Counterclockwise, buck, With universal test, 3: If the input and output voltages are the same , Please rotate a few laps counterclockwise and then use it normally! note: 1: The output voltage is the input voltage before it can be used! 2: The current can not be 5A 3: The input voltage can not be less than 4V. Specifications: Product name:DC-DC digital boost module Input voltage:DC 4V-35V Output voltage:DC 5V-45V Input current:Maximum 5A Maximum output power:100W Output adjustable rate:0.1V Maximum efficiency:94percent Note:Due to different production batches, there are differences in silk screen printing/appearance, which does not affect usage. Colour:Blue Material:PCB+electronic components Package Contents: 2 * Boost Converter Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.