The Robinair 43240 digital thermometer gives you full-feature capabilities in a case that is small enough to fit in your shirt pocket. A wide temperature range and highly accurate readings make it useful for a variety of applications. Switch selects Celsius or Fahrenheit and sampling time is just one second. Hold button freezes display for accuracy and easy-to-read display can be read even in direct sunlight. Durable case includes a cover to protect the probe. Specifications range -40 to 390° F, Accuracy ± 2 F between -14 and 212 ° F, and display resolution 0.1 F throughout range. Battery One 1.5V x 1, Size LR44.