Compatible with Sharp - Automatic Time Set - Alarm Clock: AccuSet Pre-programed with the time - no need to worry about setting buttons. Select your time zone at the bottom of the clock, turn on the DST if applicable. Plug clock in to an approved electrical source. For quick adjustment for Daylight Savings Time, slide the DST switch at the bottom of the clock to ON to add and hour (+1 hr.). For Standard Time slide switch to OFF to subtract an hour (-1 hr.) High/Low Dimmer control - Adjust display brightness with the high or low dimmer control. Backup Battery -Button cell battery CR2032 is pre-installed and used for the back up battery and the time settings. It is in a screw-secured cabinet at the bottom of the clock. Battery will last for several years. Time Zone Selection - The default time zone is Eastern Standard Time. Before you plug in the set your time zone on the bottom of the clock. Made from quality hard plastic. Great for Kids and Elderly. Perfect in any room, Bedroom, Kitchen, Garage, Living room, Den. AccuSet™ Automatic Time Set - The clock is pre-programed with the time so there is no need to worry about setting buttons. Just select your time zone at the bottom of the clock and turn on the DST if applicable. Plug the clock in to an approved electrical source. Quick Daylight Savings Time (DST) Adjustment - For quick adjustment for Daylight Savings Time, slide the DST switch at the bottom of the clock to ON to add and hour (+1 hr.). For Standard Time slide switch to OFF to subtract an hour (-1 hr.) Dimmer control - Adjust the display brightness to your liking with the high or low dimmer control. Back up Battery -The button cell battery CR2032 is pre-installed and is used for the back up battery and the time settings. It is in a screw-secured cabinet at the bottom of the clock. This battery will last for several years. AccuSet™ Automatic Time Set - The clock is pre-programed with the time so there is no need to worry about setting buttons. Just select your time zone at the bottom of the clock and turn on the DST if applicable. Plug the clock in to an approved electrical source. Quick Daylight Savings Time (DST) Adjustment - For quick adjustment for Daylight Savings Time, slide the DST switch at the bottom of the clock to ON to add and hour (+1 hr.). For Standard Time slide switch to OFF to subtract an hour (-1 hr.) Dimmer control - Adjust the display brightness to your liking with the high or low dimmer control. Back up Battery -The button cell battery CR2032 is pre-installed and is used for the back up battery and the time settings. It is in a screw-secured cabinet at the bottom of the clock. This battery will last for several years.