【Large Digital Display】The digital clock is equipped with a 9.1\" LED display, a large digital display, and the numbers are moderately spaced, clear to read, allowing you to check the time clearly even from a distance and from all angles. In addition, you can see the numbers on the screen clearly even at night. 【3 Alarm Modes】This digital alarm clock can not only be hung on the wall, but also placed on the desk, providing good visibility for seniors, children, and adults, and getting time information accurately and clearly. 3 alarm modes to choose from when you want to wake up at a specific time: 1-5 for alarms from Monday to Friday, 1-6 for alarms from Monday to Saturday, 1-7 for alarms from Monday to Sunday. 【Adjustable Brightness and Automatic Night Mode】This large LED display alarm clock comes with 3 levels of brightness adjustment according to your needs. You can adjust the brightness manually or let it adjust the brightness automatically; It will automatically dim by default between 10:00 PM and 6:00 AM. In addition, the plug-in LED digital wall clock supports daylight saving time. 【2 Groups of Alarms and Snooze Function】2 group alarms allow you to set separate wake-up times. When the alarm rings, long press any button to turn off the alarm and enter the next alarm state. Short press any button to start snooze. Note: \"Long press\" mentioned above is a long press for 3 seconds, and 5 seconds without action automatically confirms the exit. 【USB & Battery Powered】The LED digital wall clock is powered by 3 AAA batteries (not included) or USB cable (included). NOTE: If you only use the battery, it will have time memory function and voice control function, but if you only use the USB cable, it will not have these 2 functions. You can choose to use USB for charging if you want the alarm screen to always be on.