Check the listing for details. DC-DC Boost Converter Input Voltage 2-24V Output 5-28V, 5pcs. Condition: New. Listed at 13.01 USD. What is this?The DC-DC Boost converter can regulate voltage from (2-24V input) to (5-28V output).What will I get?Input voltage: 2-24VMax. output voltage: 28V (Recommended to use within 26V)Max. output current: 2A (Recommended to use within 1A)Max. efficiency: 93%Total size: 37x 17.2mm/1.46 x 0.68inch (LxW)In the package of: 5x Boost ConvertersIs there any advantages of the product?Small size, high efficiency, easy to install and use in a variety of small equipment.How to use it?1. The input voltage should not over the maximum input voltage.2. The peak current output current should not over 2A.3. The potentiometer is used to adjust output voltage, output voltage is greater than input voltage.What should I notice?All size above is measured by manual, please allow 0.1inch error.