Large Display Screen&Multi function: The alarm clock adopts a large LED display screen at the bedside, and the clear large font can easily read the time even if it is far away from you. You can easily set 5 modes using the buttons on the back: clock mode, date mode, temperature mode, night mode (on/off), and alarm mode. It's very simple and can be one of your best bedroom alarms! 3 Working Day Mode and Snooze: Three wake-up modes you can choose: Monday to Friday/Monday to Saturday/Monday to Sunday, allowing you to wake up at the right time. If you're too sleepy to wake up when the alarm goes off, you can press the "SNOOZE/LIGHT" button at the top to get an extra 1 ~ 60 minutes of sleep(the default snooze time is 5 minutes). Makes your life easier and more comfortable. Adjustable Brightness: Press the UP/DOWN button to adjust 3 levels of brightness (Bright/ Medium /Low). Digital alarm clock can be protecting your eyes and sleep quality, giving you a clear and comfortable visual experience. The alarm clocks bedside will auto dim during 18:00-6:00 when in the night mode (Adjustable time). Press and hold the snooze button for more than 3 seconds to turn off the display. Voice Control and Power Saving ModeWhen Powered by battery, You can activate the bedside clock display by making some voice like clapping your hands, rapping on the table or touching the clock when running via using battery. And the LED alarm clock will automatically turns off after 16 seconds of inactivity (Automatically enter the power saving modes). It should be noted that the time memory will be lost when the power is off. USB/Battery Powered: The LED clocks can be powered by USB cable or 3 AAA batteries (not included). Note: 1. The time memory will be lost when the power is off. 2. The LED clock is recommended to powered by USB to keep the screen bright. Power supply only by battery is not guaranteed the screen constant light (Automatically enter the power saving modes).