The Pro-Temp Commercial Thermometer is the last-word in accuracy. With all the features you’d expect in a commercial-grade thermometer, You’re assured an accurate reading every time to 1 degree C. The Pro-Temp is water and dust reisistant, as well as shock-reistant to multiple drops on a concrete floor-a must in a fast-paced commercial kitchen environment. Instant measurement of temperatures from -40F to 450F within three seconds. Reverse LCD, auto on/off features, handy cooking chart and the ability to fold into a compact unit-we’ve anticipated the demands of the professional chef. Each unit has factory certification – NSF approved for professional use, certificate included guarantees performance and accuracy to NIST standards. Three AAA batteries included.

CLEANING AND CARE INSTRUCTIONS:
CLEANING:
The PT-100 ProTemp thermometer is dust proof and splash proof to IP44
standards as stated in the specification.  Use a damp sponge or cloth to
clean the unit and probe.  You may also dip the cloth or sponge in warm
soapy water to help remove surface deposits and prevent them from
becoming hard or sticky on the unit. 
Cautions:
Do not use solvent based cleaners or methylated spirits.
Do not submerse the thermometer in liquid.
Do not place in a dishwasher.
Not Intended for Use by Persons ages 12 and Under  
Warning:
Thoroughly clean thermometer after each use to avoid cross contamination.
When measuring high temperature items personal protection such as
gloves should be used.

DO NOT ATTEMPT TO RECALIBRATE THE UNIT. 

CHANGING THE BATTERIES
On the back of the unit is a slide lock that opens the battery
compartment. 
The unit uses 3AAA batteries.Do not mix old and new batteries