Cat owners no longer have to rely on the dreaded rectal thermometer to check their ailing kitty's temperature. The Pet-Temp Instant Thermometer is an ear thermometer designed specifically for animals. It looks and works much like the ear thermometer humans have been using for years, except it has a curved sensor arm, which is ergonomically designed to fit an animal's deep, horizontal ear canal. Operating the thermometer is quick, easy and much less stressful for kitties than doing it the old-fashioned way. You simply push the button to activate Pet-Temp, open the arm, put on a lens cover, insert it into the cat's ear and push the button. It will beep when it has a reading.