Cold Storage Temperature ZonesIdeal refrigerator and freezer temperature zones as well as freezing point indicated on the thermometer to help quickly verify cold storage temperatures.  NSF CertifiedThe manufacturing process of this product is regularly checked and certified by the National Sanitation Foundation and meets the highest standards for public health protection.Easy to Read DisplayThe magnified display is easy to read and features both fahrenheit and celsius measurements.Hang or MountHang the thermometer on a rack or mount it to an interior wall with the included suction cups.