This indoor device, called the Digital Indoor Thermometer & Humidity Gauge Clock, updates temperature and humidity every 30 seconds for accurate readings. It shows a wide temperature range from 14˚F to 140˚F and humidity from 10% to 99%. It’s easy to read with a large screen and portable design for travel. You can switch between Celsius and Fahrenheit and choose a 12-hour or 24-hour clock. It can be placed on a table or wall-mounted, offering accurate readings and long battery life (about 20 months). It remembers settings even after being turned off.