Small size, high efficiency, easy to install and use in a variety of small equipment.All size above is measured by manual, please allow 0.1inch error. Please check the size, voltage, and quantity before you purchase.Input voltage: 2-24V; Max. 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: 5 x Boost Converters.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.The DC-DC Boost converter can regulate voltage from (2-24V input) to (5-28V output).