Redi-Fork Digital Probe Thermometer with LCD Matrix and Rapid Read Tip... It Lights Up and Beeps! Display turns on Automatically when temperature of food is above 115 degrees! Take the guesswork away. Instantly checks readiness and doneness of food. NEVER overcook food again! Instant temperature-accurate measure; On board light assists the visual inspection of doneness; Check fish beef lamb turkey chicken ham or pork without changing settings; Set desired temperature Redi-Fork Pro beeps when your food is ready; Helps determine E. coli safeness; Great for grilling oven and microwave cooking.