The AcuRite Atomic Alarm Clock is radio-controlled to synchronize to the correct time broadcast by the National Institute of Standards and Technology (NIST) Radio Station, WWVB, for split-second precision accuracy. The clock automatically adjusts itself for Daylight Saving Time (DST). The bold, easy to read LCD screen displays time, month, date, day of week and indoor temperature. One-year limited warranty. It's more than accurate, it's AcuRit