The AcuRite Intelli-Time alarm clock features an illuminated color display with indoor temperature (Fahrenheit or Celsius), indoor humidity, clock, date, day of week, moon phase and alarm. The integrated USB port charges compatible smartphones with 1.5 amps of power. The Clock’s alarm gradually increases in volume over a two minute time span to WAKE you up on-time and peacefully. Featuring AcuRite’s exclusive Intelli-Time technology, the clock comes pre-programmed with the correct time and date. It automatically updates itself for daylight Saving time and maintains time and alarm clock settings, even in the event of a power outage. Includes time zone settings for pst, mst, cst, est, ast, hat, akt and ndt. Temperature and humidity can greatly affect quality of sleep. The clock displays the indoor temperature with a home comfort icon that easily indicates high, low or ideal humidity level conditions for your bedroom. The clock automatically adjusts itself for daylight Saving time (DST). one-year limited warranty.