This easy-to-read and quick thermometer can be used orally or under the arm with different mode settings. A 60-second reset timer confirms that the probe has returned to room temperature. An accurate reading takes only 5 seconds, and a fever chart is on the back panel for reference. The Fever Light Bar will glow amber if the the probe detects an above normal temperature. Includes 1 replaceable "CR 2032" button cell battery or equivalent.