Large Digital Display. The digital clock is equipped with a 9.1 inch LED display. The numbers are moderately spaced and clear to read, allowing you to check the time from a distance and any angle. You can see the numbers clearly at night. Three Alarm Modes. This digital alarm clock can be hung on the wall or placed on the desktop, providing clear vision for seniors, children, and adults. Choose from three alarm modes for specific wake-up times: Monday to Friday, Monday to Saturday, or Monday to Sunday. Adjustable Brightness and Automatic Night Mode. This large LED display alarm clock has three levels of brightness adjustment. The brightness will automatically dim by default between 10:00 PM and 06:00. The plug-in LED digital wall clock supports daylight saving time. Two Groups of Alarms and Snooze Function. Two group alarms allow you to set separate wake-up times. When the alarm rings, long press any button to turn it off. Short press any button to start the snooze function. USB and Battery Powered. The LED digital wall clock is powered by three AAA batteries (not included) or the included USB cable.