Can be used for a variety of applications, including processor monitoring where conventional bimetal and glass pocket thermometers were traditionally used. The extended temperature range eliminates the need for more than one pocket thermometer. Unit employs a LCD (liquid crystal display). It operates on a standard silver oxide watch battery and allows instantaneous readings when update button is pressed. When update button is not engaged, the unit updates in 10 second intervals. Will automatically turn to an "OFF" mode after 50 minutes of non-use. The "OFF" mode extends battery life indefinitely. Accurate to +/- 2° F/C.