Oral Digital Thermometers are water-resistant, immersible for up to 30 minutes. Microtechnology ensures precision measurement within ± 0.2ºF. and ± 0.1ºC. 89.6ºF. to 109.4ºF. and 32.0ºC. to 43.9ºC. “On-off” switch and automatic switch-off. Performs automatic self-test to ensure accuracy. Memory stores the most recent measured value. Battery included with two-year warranty. Mercury-free. 24/cs.