Audio & Visual Refrigerator/Freezer Thermometer Instrument Range: Signal sounds at 15 or 46F/-9.5 or 8C.39-in./1-m. sensor cable, Shatterproof, Freezer Accuracy: 14.9 to 32F/-9.5 to0C 4F/2C 32 to 104F/0to 40C 2F/1C.Refrigerator Accuracy: 32 to 104F/0to 40C 2F/1C.For Refrigerator/Freezer. Dual progress display, Audio/visual alert, ABS plastic. Sliding mode switches, 2-way mounting: Velcro/suction.1.5V AA IEC LR6 Alkaline. Size: 5-1/4 x 1-in. Five year limited warranty; these are its features and facilities. Thermometer Instructions: Place the probe sensor well inside the refrigerator or freezer in a central location by pressing suction cup firmly against inside surface. Remove the protective papers from one side of each of the Velcro tab pairs and adhere complete pairs to rectangular areas on back of case. Determine where the case will be mounted to the outside surface. Wipe the surface area clean, remove the protective papers from opposite sides of Velcro tab pairs, and adhere tabs to surface by pressing firmly. Wait 15 minutes for adhesive to set before removing case. Select Fahrenheit or Celsius using sliding mode switch on side of case. Select Refrigerator or Freezer using sliding mode switch to the far left of the display. Select audio/visual alert by sliding mode switch to the immediate left of the display to the ON position. Alert appears on Refrigerator/Freezer side of the dual display when audio/visual alert is ON. Alert sounds and LED lights flash for 5 seconds every minute when the internal temperature rises above the safety zone. Avoid exposing your thermometer to extreme temperatures, water or severe shock. Avoid contact with any corrosive materials such as perfume, alcohol or cleaning agent. Wipe display clean with a damp cloth.