PORTABLE & DURABLE - The mini indoor thermometer has a sleek design and is only 1.69"x1.69", 1.3mm thick, and has a net weight of 21g. The LCD screen is very hard and scratch resistant for better durability. The wall-mounted indoor thermometer is equipped with a highly accurate sensor which accurately displays the current temperature, humidity and expression of comfort. HIGH PRECISION - The home thermometer adopts the latest sensor, which is refreshed every 10 seconds, accurate and reliable. Temperature measurement range: -10 ~ +70 (14 ~ +158), temperature measurement accuracy: 1.0 (1.8), temperature resolution: 0.1 (0.2). Humidity measurement range: 10% RH ~ 99% RH, humidity measurement accuracy: 5% RH, humidity resolution: 1% RH 3 WAYS TO PLACE - There are 3 ways to place the indoor thermometer, you can mount it on the wall by the hanging hole on the back of the indoor wall thermometer or the double adhesive tape face. You can also place the mini indoor thermometer indoors, such as living room, bedroom, bathroom, kitchen and children's room, to observe the temperature change in real time. EXPRESSION OF COMFORT - The indoor hygrometer has a display of expression of comfort, it displays an expression of dissatisfaction when the humidity is below 40% or above 70%; it shows a smiling face when the humidity is between 40-70%. Set the air conditioner, humidifier and heater to different expressions to make the room reach the optimum temperature. VARIOUS USAGE SCENARIOS - The indoor hygrometer thermometer is powered by a replaceable CR2032 battery (included) which the shelf life is more than 24 months. Indoor digital thermometers are widely used in homes, nurseries, instrument rooms, grow rooms, wine cellars, offices, basements, warehouses, locker rooms, schools, hotels, laboratories, aquaculture, factories, etc.