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Jumbo Thermometer with Fever Glow has a large LCD screen. Making it easy to read temperatures in dim light. It includes the Visual Temperature Reference (VTR) system, which uses a color bar to show temperature levels: yellow for "above normal" and red for a fever. It is suitable for oral, rectal, and underarm use, and provides a reading in five seconds. The Fever Glow technology turns the screen red and sounds an alarm when a fever is detected.