Le Cordon Bleu Professional Chef's Digital Thermometer Recommended by Chefs of Le Cordon Bleu, NSF Certified Quick read digital thermometer measures meat temperatures after 5 seconds; Sensor is in the tip; insert tip at least 1-inch deep for accuracy Insert tip of the sensor into the thickest part of the meat (without touching bone or heavy fat areas); readings from -50F to +392F Thermometer comes with free pocket case, battery installed and one spare battery; Battery lasts one year with continuous use Clean with damp soapy sponge; do not place in dishwasher