Freezer Alert Alarm for Freezers/Refrigerators. Alarm Sounds and LED Lights Flash when Temperatures Rise to Unsafe Levels. Warns of Potential Food Spoilage and Protects Your Valuable Frozen Foods. Displays Room Temperature. Display Can Be Set in °F or °C. Includes Hook-n-Loop Tape to Secure to Any Surface. Perfect for Refrigerator/Freezer in Basement Garage or Anywhere. Great for the Professional Driver with Mobile Refrigerator/Freezers. Be Warned When Voltage Drops or Malfunctions Happen. 3 Cable with Probe Sensor Detects Temperatures. Includes AAA Battery.