Keeps your RV refrigerator frost free. Work with any model RV Refrigerator. Easy install with only one wire DC connection needed. In most cases will connect to interior light or slide fan lead through the drain tube to make the DC connection at the back side. Very low amp draw. Makes the inside an even coldest top to bottom. Allows refrigerator to get cold faster. Allows you to lower the thermostat setting number and still maintain cold temps. Takes up no space when attached to fins. Fan frame size is 5 1/8 x 4 inches and only 1/2 inch thick. Each of the fans measures 2 3/8 x 2 3/8 inch and 5/16 thick. Fan amp draw per fan is 1/10 of an amp