Fangrui Product Details The Module Uses High-quality Lm2596 Chip, With High Efficiency (up To ), Low Heat Generation, And Can Easily Carry More Than 3a (short Time) Current This Module Uses Machine Mounting And Reflow Soldering. At The Same Time, Each Module Has Undergone Two Hours Of Aging Test Before Shipment On Board Stabilized Voltage Power Supply, Just Connect The Input Terminal Of This Module To The Cigarette Lighter For Power Supply, And Then Adjust The Potentiometer To Supply Power For Your Mobile Phone And Other Devices It Can Be Inserted Into The Pin Through The Lead Or On The Hole Board For Use; Or Directly Solder Pcb After Adding Pins. System Working Voltage Test. This Module Can Be Used To Debug The Working Voltage Range Of Various Voltage Test Systems Module Nature: Non Isolated Buck Rectification Mode: Asynchronous Rectification Color: Blue Black Material: Pcb Input Voltage: 3.2v-40v Output Voltage: 1.25v-35v Output Current: 3a (maximum) Conversion Efficiency: (maximum) Switching Frequency: 150khz Output