Features temperature in Fahrenheit and Celsius from -58ºF to 158ºF; humidity from 20percent to 99percent ; weather forecast; 12/24hr clock with alarm and snooze; and calendar with day, week, month, year, and Lunar Phase. Requires 1 LR1130 battery (included). measures 2-1/8" x 4-1/4" x 1-1/8". gift boxed.