Extech 39240 Waterproof Stem Type Thermometer Waterproof Thermometer, Pocket size with Maximum/Minimum recording 2-3/4-Inch (70 mm) Stainless steel stem Degree Celsius / Degree Fahrenheit switchable ranges of-40 Degree Fahrenheit to 392 Degree F (-40 Degree Celsius to 200 Degree Celsius) MAX/MIN recall of high and low temperatures Data Hold and Auto power Off features