Refrigerator Freezer Thermometer Metal Detectable Yes Case Material Plastic Features Alcohol Based Clips or Hangs in Freezer or Refrigerator Safe Temperature Zones Indicators Lens Material Plastic Manufacturers Warranty Length 1 yr Maximum Temperature 60 Degrees F Minimum Temperature -20 Degrees F For Food Contact No Product Type Refrigerator/Freezer Thermometer Accuracy +/-2 Degrees F Application Cold Storage Overall Length 3 3/4 in Display Type Analog NSF Certified Yes