Large Display & Multi-function- This digital alarm clock has a 6.3-inch large LED display, supports 12/24-hour time display, date and temperature display, allowing you to check the time at a glance even if it is far away from you. Long press the "MODE" button to switch the LED to display the time, date and temperature in sequence. Voice Control & Power Saving Mode- When powered by battery, you can get a function - voice control. If you make some sounds, such as clapping, knocking on the table, or touching the clock, the display will turn on. The LED alarm clock will automatically turn off and enter power saving mode after 16 seconds of no operation. It will automatically turn on/off power saving mode in different power modes (battery - on/AC adapter - off). 3 Adjustable Brightness- Press the "UP" button to adjust three brightness levels (bright/medium/low). In night mode, it will automatically dim during 18:00-6:00. Long press the snooze button for more than 3 seconds to turn off the display to prevent the screen from being too bright at night to disturb sleep. 3 Alarm Modes & Snooze- This LED bedside clock has three alarm modes: Monday to Friday / Monday to Saturday / Monday to Sunday. Long press the "ALARM" key to enter the alarm setting. You can press the "UP" or "DOWN" button to adjust the hour and minute. Press the SNOOZE button to get an extra 5 to 60 minutes of sleep. USB or Battery Powered- This LED electronic alarm clock can be powered by a USB cable or 3 AAA batteries (not included). The time memory function will be lost when the power is off. This office clock includes a charging USB cable for your convenience of power supply.