Our FDA Approved personal digital thermometer accurately reads both Fahrenheit (90F - 108F) and Centigrade (32C - 42.9C) temperatures. Given its small size and sensitivity it allows temperature to be taken by mouth, rectum or under arm. The thermometer is fast, easy-to-read, and comes with a plastic storage case which is ideal for showcasing your logo. Press the button, insert the probe and the unit beeps when the temperature reading is done. Operates on a single 1.5 V DC button cell battery. 3/4" W x 5" H x 3/8" D