[Parameter]: Great little synchronous buck converter 20A DC-DC, 6V-40V to 1.2V-35V, can be used to convert 24V to 12V 5V [Function]: Synchronous rectifier dedicated MOSFET;output voltage adjustable, output current adjustable, 75V / 80A large current dual MOS tube, high frequency low resistance electrolytic capacitor; over current protection; short circuit protection [Note]: You may hold the terminal blocks tightly with a needle nose when you first loosen the screws;you can add some hot glue to keep the large inductors and caps from moving excessively [Applied for]: Emergency backup power for charging flashlights phones radios and camping trailer use; for projects,landscape lighting, solar setup,RGB led,for 2560,USB power,child quad bike,LiPO batteries;Lithium-ion battery pack,battery charger [Hightlights]: Adjust potentiometer:Clockwise-increase and counterclockwise-decrease; Conversion efficiency:95%; Module Type:Non-isolated; 2 heat sink enhance heat dissipation; low ripple; stable output Colour:Photo Color Material:plastic Package Contents: 2 x 300W 20A Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.