[Level 3 air comfort indicator] Hygrometer Hygrometer with humidity level icon can quickly display dry or comfortable or humid air conditioners. Ensure proper humidity and monitor the familys living conditions and health by preventing colds, dry skin, asthma,allergies, molds, etc. [Clear LCD display, easy to read] The humidity thermometer has a large 3.3-inch (approximately 8.5 cm) LCD display. The frame is neat and thin, making it easy to read from any angle and distance. Portable and light, convenient to carry around. or canbe switched by "and", 12 hours or 24 hours selector "-" switch. Note: No backlight function [High precision and fast refreshing] The digital indoor thermometer is updated every 10 seconds to provide you with updates and the latest readings. Wide measuring range, measuring temperature from -9.9 F to 60 C, humidity from 20 percent to 95 percent . The temperatureaccuracy range is about 1, and the humidity accuracy is 3 percent relative humidity. [3 installation smart designs] The humidity thermometer has a variety of installation options: desktop stand, magnetic back, and adhesive installation. With adhesive pads and built-in magnets, you can paste or place it anywhere, such as refrigerators,counters, living rooms, baby rooms, kitchens, basements, offices, greenhouses, guitar rooms, offices, gardens and basements [Battery power supply and time setting] Equipped with 2 CR2032 button batteries, each battery can be used for 8-12 months. The thermometer shows the day of the week and the time. Long press the "Settings" button to enter the time setting.