DINOSAUR ELECTRONICS INC. Electronics Ciser NORCOLD/SERVEL EXER. With their built in volt/ohmmeters and LED Troubleshooters the Dinosaur Norocold/Server Exer allows the technician to easily check the refrigerators for proper function. The work is done without having to go back and forth inside the coach or having another person operate the refrigerator. And just in case a quick check of the manual is needed the Dinosaur Norocold/Server Exer Electronics Ciser can also double duty by allowing you to check the thermostat on the wall. With thick shafts and built in voltmeters the Dinosaur Exer generator doesn't need an original backplate. And all electronic components are built inside the exerciser. There is no need to remove the door or even open/close the door - the device works by plugging in the thermostat directly into the exerciser. If the thermostat doesn't work don't worry just plug it in and it will still work. You just need to plug it in and then plug it into the back of the thermostat housing. Package Contents: DINOSAUR ELECTRONICS INC. NORCOLD/SERVEL EXER Electronics Ciser DINOSAUR ELECTRONICS INC. NORCOLD/SERVEL EXER: Electronics Ciser