Thermometer is clinically accurate with 2/10ths of a degree Fahrenheit. It can also be switched to measure in degrees Celsius. Instrument can be used for oral, rectal or underarm use and are waterproof for sanitary cleaning. Unit offers a rigid tip, a peak temperature tone and fever alert for temperatures above 99.5ºF. Additional features include memory recall of last reading, low battery indicator and automatic shut-off. Both units come with a storage case, 5 probe covers, LR 41 battery and English/Spanish instructions.