High accuracy: The thermometer inside measures every ten seconds to provide updated and accurate readings. The measuring range is large and can withstand temperatures from -50C to 70C, -58F to 150F and . measure. Measure 10 F humidity % to 99 %. COMFORT ZONE DISPLAY : The baby face symbol on the inside thermometer shows a smiling or sad expression when humidity changes, remind you to adjust the humidifier or dehumidifier settings. LCD DISPLAY : This digital indoor thermometer has a backlit LCD display, so you can clearly monitor temperature, humidity and weather even in low light conditions. MULTIFUNCTION MEASUREMENT : The digital hygrometer inside with clock function can not only measure the temperature and humidity of the environment, but also has a 12/24 hour clock function. Time and calendar can be set separately via the mode button. Two installations : The humidity meter is equipped with two installation options: a table stand and a hanging hole. You can install the wall thermometer in the living room, kitchen, guitar room, office and basement wherever you like. It consists of 2 sections powered by AAA batteries (not included).