Keeping refrigerators and freezers at the proper temperatures will help with energy usage and limit excess food spoilage. With a thermometer that can be moved to different locations hot and cold spots can be measured accurately. The benefit to this combination thermometer and timer is that it does the hard work for you - the safe zone temperatures are preprogrammed into the unit and if the temperatures exceeds a the safe zone an alert will show and the timer is activated. Perfect for vacation homes, deep freezers, wine cellars or any other temperature controlled area that may not be monitored on a regular basis.