Circulate air inside your fridge to reduce food spoilage. Battery-operated fan cuts initial cool-down time by 50%. Helps maintain more consistent temperature inside refrigerator compartment. Runs over 30 days on 2 D cell batteries (sold separately). Also works in ice box or ice chest, dropping cooler temperature up to 25%. Convenient on/off switch. Not for use in freezer compartment. Works in ice box or ice chest 3 1/2""H x 2 3/4""W x 2 1/2""D Batteries sold separately | Valterra FridgeCool Fan with On/Off Switch