This waterproof digital thermometer comes with a case and sleeve to prevent unsanitary matter. The Hubert device is 7" overall with an easy to clean 3" stainless steel stem. This waterproof digital thermometer reads the temperature in less than five seconds with an accuracy of ±0.5°F. The Hubert device includes a battery. This waterproof digital thermometer displays temperatures in a range of -40° to 450°F (-40° to 230°).