Waterproof Digital Thermometer is recommended as a food safety tool in commercial & industrial applications. Features a switchable Celsius/Fahrenheit scale reduced tip probe for fast response time extra large readable digits hold button to display reading for several seconds and pocket clip for portability. Fahrenheit range is -40° through 311°. Celsius range is -40° through 155°. Thermometer is approximately 3.9” long. NSF certified.