The most compact Tympanic thermometer on the market. Measures core temperature instantly from the ear reliably and accurately. Switchable dual scale measurements in either F or C modes. Range 89.6F - 108F +/- .4F or 32C - 42.2C +/-.2C depending on scale selection. Probe cover FREE design is less costly and more convenient to use. Large 6mm display is easy to read. Illuminated backlight display. Compact (5" long, 1.9 oz.) ergonomic design fits comfortably in operator's hand and patient's ear. Audible fever alarm at 99.5 (37.5C). Stores last 12 readings in memory. Complete with Lithium battery, storage/travel case, and operating instructions. Two year warranty. Made in China, Inspected in U.S.A.- Tympanic Thermometer Mfr. Direct