Features:This is a great 1200W DC to DC step-up power supply module for electric equipment, digital products, laptop, etc.Input and output are designed with screw terminals for convenient wire connection and disconnection.There is a big heat sink and cooling fan that would ensure a better heat dissipation.Specifications:Type: Non-isolated boost moduleMax Input Current: 20A (could reach 25A at 12V-24V when adding cooling fan)Quiescent Current: 15mA(will increase when convert 12V to 20V)Constant Current Range: 0.5A to 18A(+/-0.3A)Reverse Input Protection: Yes (150A MOS)Temperature Control Fan: Yes (Fan starts to work if more than 55)Operating Temperature: -40 to 85(if temperature is too high, please enhance heat dissipation)Frequency: 150KHzShort Circuit Protection: Yes (input 30A fuse)Wiring Method: Terminals (Please use large current copper wire)Size: 130 x 64 x 52mm / 5.12 x 2.52 x 2.04"Current Adjustment:Adjust "A-ADJ" potentiometer counterclockwise about 30 circles to minimize the output current before connecting to load. Then adjust "A-ADJ" clockwise to the current value you need.If you use the module for battery charging, connect to output after battery is fully discharged. Note:Package Includes:1 x Module