ITEM NAME:Digital Step Up Power Supply Module Boost DC-DC 4.5-40V 5-45V Voltage Regulator Descriptio n Description: Features: 100% brand new and high quality. This is a great DC to DC step-up power supply module for electric equipment, digital products, etc. Input and output are designed with screw terminals for convenient wire connection and disconnection. There is a heat sink on board that would ensure a better heat dissipation. It can also be used as a power supply for laptops or voltage regulator for solar panels. Instructions for use: 1: Connect the power supply (4.5-40V), 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! Specifications: Input voltage: 4.5-40V Output voltage: 5-45V Input current: max. 5A Notice: 1: The output voltage is greater than the input voltage before it can be used! 2: The current can not be greater than 5A 3: The input voltage can not be less than 4.5V Package Included: 1 *Â Digital Step Up Power Supply Module Note: 1.Due to the manual measurement and different measurement methods, the actual size could be slightly different. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. We offer you what you need! Digital Step Up Power Supply Module Boost DC-DC 4.5-40V 5-45V Voltage Regulator.There is a heat sink on board that would ensure a better heat dissipation. We'd like to settle any problem in a friendly manner. Input current: max. 2: The current can not be greater than 5A. We want to make sure you are happy with our item.