Sony Dual Gradual Alarm Clock with AM/FM Radio, Sleep Timer, Extendable Snooze, Radio or Buzzer Alarm Sound, Gradual Alarm Volume Enhancer, Large Half Mirror LCD Display, Brightness Control, 3 Black Compact Dual Alarm Clock Radio with a Bright, Large LCD Digital Clock in Half Mirror Display and Attarctive, Sleek, Modern Design that Goes with Any Interior Dcor at Home or at Work. Battery Back-up maintains the clock and alarm operation in the event of any power failure and maintains the correct time. Dual Alarms allows for separate wake up times for husband and wife or two siblings sleeping in the same room, as well as dorm buddies that awake at separate times. Display Brightness Control allows you to adjust the brightness of the display between High, Medium & Low. This is helpful to have some dim light in the room or lower it, if it bothers your sleep. Gradual Wake Alarm starts with a subtle, low volume that gradually increases to a reasonably high level in order to gently wake you from your sleep, instead of being awakened abruptly by an extra loud volume, or oversleeping by an alarm volume that is too low. Awake to your favorite music or talk shows with the AM/FM Radio or by the original Buzzer Sound. Extendable Snooze gives you the freedom to easily choose your own snooze time instead of being held captive by the short time intervals of other snooze timers. Each press of the snooze button adds an additional 10 minutes to your total snooze time for up to a full hour of uninterrupted sleep. Sleep Timer puts you to sleep peacefully while playing your most favorite tunes you wish to select. Different lengths of play time are 15, 30, 60 or 90 minutes of listening pleasure to relax you to sleep. Sleep like never before when you fall asleep to the sounds you love.