La Crosse Technology WS-8117U-IT-C Digital Wall Clock, with Temperature and Moon Phase Sets automatically by radio signal to atomic clock for time/date accuracy Reports indoor/outdoor temperatures in Fahrenheit or Celsius plus current moon phase 12- or 24-hour time mode; dual LCD screens; alarm with snooze Covers 13 different time zones. initially let the alarm to adjust to the environment to get the accurate time and temperature details refer the manual under the product description for installation and trouble shooting details for this product