[Level 3 air comfort indicator] Hygrometer Hygrometer with humidity level icon can quickly display dry/comfortable/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. / canbe switched by "+", 12 hours/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% to 95%. The temperatureaccuracy range is about 1, and the humidity accuracy is 3% 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.