SMAKN&reg; DC-DC Voltage Step-up Module 4.5-32V to 5-42V 4A Boost Converter High Quality Module Properties: Non-isolated step-up module (BOOST). Input Voltage:4.5-32V. Input Current:0-4A. Output Voltage:5-42V(Adjustable). Output Current:0-4A(the higher boost voltage difference, the lower output current).