Item Descriptions:-Input voltage: DC 2V-24V, Output Voltage: DC 5V-28V, Maximum output current: 2A, Maximum Output Voltage: 28V, Efficiency: Max 93%.-Simple Adjustment: Easily modify output voltages using the IN+ and IN- terminals along with the adjustment potentiometer, allowing customization within the 5V to 28V range.-Safe Usage: Prioritizes safety with strict guidelines: avoid exceeding the maximum input voltage and ensure peak output current remains under 2A.-Versatile Functionality: Performs as a boost module for various applications such as battery storage, power transformers, DIY adjustable voltage stabilizers, industrial equipment, offering outputs at 5V, 9V, 12V, and 28V.-Multipack Inclusion: Each purchase includes a set of 5 DC-DC boost power supply application modules, offering multiple solutions in one package.Package:5 x DC-DC Step Up Power Apply ModuleItem Specifications:Maximum Output Current:2 AInput voltage:DC 2V-24VMaximum Output Voltage:28 VEfficiency:?93%Number of pieces:5