Fangrui Product Details Input Voltage: 5.5-30vdc (when The Input Voltage Is 5v, Voltage Rise And Fall Can Also Be Achieved, But The Measurement Of Voltage And Current Is Not Accurate; When It Is Below 4.7v, Undervoltage Protection Is Applied) Output Voltage: 0.5-30vdc Adjustable Output Current: 0.2-3a Adjustable, With Enhanced Heat Dissipation Up To 4a (please Enhance Heat Dissipation When The Module Temperature Exceeds 65 Degrees). Equipped With A Constant Current Indicator Light, The Output Power Should Not Exceed 35w Or The Current Should Not Exceed 4a When Outputting At Low Voltage. Overloading And Burning Are Not ! Voltage Display Resolution: 0.05v Current Display Resolution: 0.005a Conversion Efficiency:around Soft Start:yes (there Is A Possibility Of Failure During The Startup Of Modules With High Power And Load) Input Reverse Protection:yes Output End Anti Backflow:yes Short Circuit Protection:yes Working Frequency:180khz Due To Different Batches, There May Be Differences In Product Appearance And Printed