Fully automatic-turns itself on at 110 degree off at 90 degree. Can be mounted at the top of the fridge rear compartment, on the floor of the compartment or on the back of the refrigerator to blow air over the coils. Wind tunnel design provides more effective air movement in refrigerator vent compartments, increasing cooling efficiency up to 40% on hot days. 12 volt.

 PROP 65 WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov