Chronomatic-291 AM/FM LED Clock Radio (120-1591A) Features Faxback Doc. # 17110 The Chronomatic-291 AM/FM LED Digital Clock Radio with Battery Backup and Battery Sentinel uses a superior electronic design that has many special features: Large Digital Display - Makes the clock easy to read. Push Button Operation - Makes the clock easy to use. Sleep Feature - Lets you program the radio to play for up to 1 hour 59 minutes before the radio automatically turns off. Snooze Features - Lets you temporarily turn off the alarm or radio for about 9 minutes so you can get a few extra minutes sleep. Battery Backup with - Maintains the clock and alarm operation during a Battery Sentinel power failure. Earphone Jack - Allows private listening through an optional earphone. Dimmer - Lets you adjust the display to suit the room's lighting.