[Easy to Read and Use] The indoor hygrometer is ready to use right out of the box, with no complicated function buttons. Thanks to its clear LCD screen, for example, 20°C (temperature); 26°C indicates a comfortable current temperature, and the thermometer displays humidity; 50% RH means "humid" or "dry." The temperature can be adjusted using heating or ventilation. [Mini Digital Hygrometer] This stylish thermometer is very compact, measuring 43 x 43 x 13 mm and weighing 21 g, saving space and making it easy to carry. The indoor hygrometer can be placed on a table, attached to the wall with an adhesive sticker, or hung up. It operates on a CR2032 battery (included). [Precise Measurement and Practical Display] The digital indoor thermometer incorporates a temperature and humidity sensor. Temperature measurement range: -10°C to 70°C. Humidity measurement range: 10% to 99% RH. Temperature measurement accuracy: ±1°C; Humidity measurement accuracy: ±5% RH. If the value is within the recommended range or action is required, the comfort indicator will display the room's climate conditions using two symbols. [Know the temperature in your home] With the ARCELI mini room thermometer, you'll know the exact temperature and humidity in any room you're in. Measure your room's humidity and temperature remotely, and use your humidifier and dehumidifier in time to monitor your family's health and prevent colds, dry skin, asthma, allergies, and mold on your walls. [Suitable for many scenarios] The indoor thermometer can be placed on a table, hung on a wall, or attached to a wall. It can be widely used as a thermometer in living rooms, greenhouses, musical instrument rooms, basements, cellars, warehouses, barns, nurseries, dressing rooms, aquariums, aquaculture, garden sheds for humidity monitoring. It can also be used with humidifiers, heaters, and air conditioners.