Measures indoor temperature (Fahrenheit and Celsius) and humidity (-percent RH). Stands upright for tabletop use and features magnetic backing for multiple placement options. Humidity level meter indicates a low, high, or ideal humidity level for your indoor environment and health. Displays high and low records for the past 24 hours. Trend arrows indicate whether temperature/humidity is rising or falling. Measures temperatures from 32 to 122 degrees Fahrenheit, 0 to 50 degrees Celsius. Measures humidity from 16 to 98% relative humidity. Powered by 1 AA alkaline battery (not included). Measures 3 inches tall, 2.5 inches wide, 1.3 inches deep