Features: 1. The module no longer needs the traditional potentiometer to adjust the output power supply, only needs to press the "+"or "-"button to easily adjust the voltage, thus saving the trouble of using a slotted screwdriver. 2. System working voltage test. This module can be used to debug various voltage ranges when doing projects, which is very easy and convenient. 3. Accurate incision and interface ensure perfect applicability. Suitable for installation location and easy to install. 4. The product is made of high quality materials. It can effectively avoid corrosion and wear and is durable to use. 5. Professional chipsets provide excellent performance in the system. 6. Easy operation, anti-aging, prolong service life. Specifications: Model: HW-817 Input voltage: DC 5.5V to 35V Output voltage: DC 0V to 30V When the output voltage is less than 2V, the output indicator will not light up again. Output current: maximum 3A, long-term work is recommended to use current within 2.5A, more than 2A need to add heat sink Conversion efficiency: up to 92% Working temperature: -45 ° C ~ 85 ° C Size: Approx. 4.4*2.8*1cm/1.73*1.1*0.39inch Package List: 1 * Module 1、The module no longer needs the traditional potentiometer to adjust the output power supply, only needs to press the "+"or "-"button to easily adjust the voltage, thus saving the trouble of using a slotted screwdriver. 2、System working voltage test. This module can be used to debug various voltage ranges when doing projects, which is very easy and convenient. 3、Accurate incision and interface ensure perfect applicability. Suitable for installation location and easy to install. 4、The product is made of high quality materials. It can effectively avoid corrosion and wear and is durable to use. 5、Professional chipsets provide excellent performance in the system.