The DayMark Hanging refrigerator/freezer thermometer has a hanger which allows the thermometer to be turned forward or back. This compact size thermometer clips to rack or attaches with suction cup. Temperature Range -20 degree F to 90 degrees F and -20 degree C to 40 degrees C. Safe temperature zone indicators. NSF listed. Measures 3-37/64-inches length by 53/64-inches width by 13/32-inches height. Sold as a pack of 2. DayMark Safety Systems is located in Bowling Green, Ohio, and is a leader in personal, facility and food safety systems. Founded in 1989, DayMark specializes in products that assist restaurants and other food service establishments in complying with FDA and other compliance codes. DayMark Food Safety products are being used in food establishment locations in the United States and worldwide.