Measures core temperature instantly from the ear reliably and acurately. Patented technology scans 512 times per second. Range 93.2°F-109.4°F ± .2°F or 34°C ± .1°C depending on scale selection. Probe-cover-free design is less costly and more convenient to use. large 6mm display is easy to read. Ultra compact (4.5" long, 1.5 oz.) ergonomic design fits comfortably in operator's hand and patient's ear. Fever alarm at 100.4°F. Complete with lithium battery, zippered nylon storage/travel case and operatinrating instructions. 2-year warranty.