Extech 39240 Waterproof Pocket Thermometer is designed with a durable 2.75" (70mm) Stainless steel stem capable of measuring from -40 to 392F (-40 to 200C), with +/-2F/1C accuracy, and 0.1 resolution. The Extech 39240 features MIN/MAX functions for high and low temperatures, switchable C and F units, and data freeze function.