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The "Lo" means the ambient temperature below 32℃/℉. Please start take your temperature when see "Lo".
Fast and Accurate Reading: Fast measurement, normally is 0.5-1 minute. This thermometer is clinically accurate with high precision
Wide Range of Use：Works for orally, rectally and in armpit. It is suitable for all ages, babies, children, adults and pets to measure temperature.
Indicator: When the measured value is lower than 32 degree, the display shows L; If higher than 42 degree, it shows H. With memory function, auto display the last measured value after power on, help you easily track the fevers progress.
Auto Power Off: The thermometer has an automatic shutdown function. If no action is taken, it will shut down after 10 minutes. But in order to extend the battery life, it is recommended to turn off the power timely after measurement.
Easy To Clean & Carry: The waterproof tip allows you to clean the thermometer in a simple and hygienic way. Equipped with a hard case that you can store it convenient and carry it anywhere. New and old packages are sent randomly.