The Braun ThermoScan 3 is an infrared ear thermometer that provides an accurate temperature measurement in just a second. The disposable lens filters are simply placed on the sensor tip, measuring the infrared heat generated by the eardrum and tissues surrounding the ear, allowing you to get the body temperature of a person. An audio fever indicator helps interpret the reading as it beeps once when normal, twice when elevated, and four times when high temperature. Moreover, this thermometer can recall its last reading, making it easier for you to track and compare the temperature of a sick person. This product comes with 21 probe covers, 1 3V lithium battery, and a protective cap.