Insignia&trade; Clock Radio with Time Projection Display - White/black Battery backup: With included cell battery keeps the time during a power outage. Adjustable high/low clock dimmer: Lower the dimmer to keep your bedroom darker while you're sleeping. Sleep feature: Provides background music for up to 90 minutes to help you fall asleep. Snooze feature: Easy to use with large button on top of the clock radio. Snooze functions in 9-minute intervals. Time projection display: Shows the time in red on a wall above the clock radio. Rotate button: Provides 180 image flip of the time display. Manual angle adjustment moves display from 0 to 180 arc. Manual focus: Allows you to clarify the time projection at projected distances of 3'-8'. Built-in AM/FM digital tuner: For convenient radio and alarm use. Dual alarms: To ensure that you won't wake up late.