Features: *With voltmeter display and the voltmeter can be self-calibrated. Using a more advanced voltage microprocessor, the error of the voltmeter is ±0.05V, and the range is 0~40V. (To ensure the accuracy of the voltmeter, please ensure that the input voltage is above 4.5V) *Touch the button to switch between measuring input or output voltage, and there is an indicator light to show which voltage is being measured, and the setting is saved, even if the power is turned off and on again. *The voltmeter can be turned off, and it can be easily realized by touching the left button when it is not needed. *With terminal blocks, it is easy to use without soldering iron, and the connection points of welding wires are reserved. *Input voltage 4.0~40V. (The input voltage must be 1.5v higher than the output voltage) *Adjustable output voltage range 1.25V～37V continuously adjustable. (The input voltage must be 1.5V higher than the output voltage) *The output current is 3A, and it is recommended to use it within 2.0A. The high current needs to strengthen the heat dissipation. *The output power is 20W, please strengthen the heat dissipation if it exceeds 15W. *High conversion efficiency, an average of 88% (efficiency is related to input, output voltage, current, and pressure difference) *With reverse connection protection, reverse connection will not burn *With overheat protection and short circuit protection Specifications: *Product Name:Step-down Power Converter Module *Material:Electronic component *Size:66mm*36mm*14mm *Color:Blue Package Contents: 1 x Step-down Power Converter Module Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. [ADJUSTABLE OUTPUT RANGE] Enjoy a continuously adjustable output voltage range from 25V to 37V, perfect for various applications. Just remember that the input voltage must be at least 1.5V higher than the desired output for optimal performance. [EASY CONNECTION] The module comes equipped with terminal blocks for effortless connections without the need for soldering. It also provides reserved points for welding wires, making setup straightforward and accessible for both beginners and experienced users. [SAFE AND RELIABLE] With built-in reverse connection protection, overheating protection, and short circuit protection, this power converter ensures safe operation under various conditions, giving you peace of mind while working on your projects. [SIZING REMINDER] Please check your specifications carefully before use to ensure compatibility.