1 X LCD Digital Display Temperature and Humidity Meter with Alarm Clock Hygrometer Economical way to monitor indoor temperature and humidity Measures temperatures as low as -58 Fahrenheit and up to +158 Fahrenheit Display features one-inch tall digital numbers. Powered by 1 x AA battery (not included) Displays temperature, humidity and time simulatenously If used outdoors, please place under protected area such as a covered porch.