PENN A19AAT-2C Refrigerator Thermostat by Johnson Controller. Convert any freezer into a kegerator! Just plug the freezer into the outlet cord, place the gas-filled sensor in the area to be controlled and program the temperature. This manual thermostat simply turns off the freezer when it reaches the specified temperature. Other features include rotary dial temperature adjustment, a 6-foot power cord with piggyback style plug. Adjustable 20 to 80F (-7 to 27C).