How to get an accurate reading in 10s? 1. Please read the product manual carefully. 2. Start Measuring when You See “Lo℉”. 3. Pay attention not to touch the probe with your hands or other objects with high temperature Before taking your temperature. Why are the temperature readings inconsistent? If you measure directly after powering up, the measurement results are inaccurate and the measurement time is up to 30 seconds or more. Be sure to start measuring when you see “Lo℉”. How do I replace the battery? 1. Gently pull the battery cover off by hand at the top of the thermometer. 2. Place a fresh 1.55 V button cell battery of SR41, UCC392, or LR41 or equivalent into the battery compartment with the positive terminal on. How to switch between °C and °F? During off status, Press and hold the on/off button for about 3 seconds, and when you hear the "Bi", immediately press the button again. Is the thermometer waterproof? Yes. Please note that only the tip of the thermometer (the measuring part) is waterproof. Oral Thermometer Oral Thermometer Basal Body Thermometer Basal Body Thermometer Basal Body Thermometer Thermometer Covers Ear&Forehead Thermometer is a professional and strong health brand dedicated to providing customers with professional personal care products. Our products are selected and produced strictly and professionally, and are at the top level of the market. are well received by customers.