Large Display & Multi-function: Digital alarm clock with large LED display (6.3"x0.7~1"x2.36"), which lets you check the time clearly at a glance even it is far from you. Our smart clock with 5 mode: clock mode, date mode, temperature mode, night mode (ON/OFF), alarm mode. The buttons on the rear are very self explanatory, so it is very easy to set up Adjustable Brightness: Just press UP/DOWN to adjust the three levels of brightness (Bright/ Medium /Low). Besides, the bedside alarm clock will auto dim during 18:00-6:00 when in the night mode, or you can set another periods of time for your need. Just press and hold the snooze button for more than 3 seconds to turn off the display to prevent the screen from lighting up at night to interfere with sleep. Working Day Mode and Snooze: There are 3 alarm modes to choose when you want it to wake you up at fixed time: Monday to Friday/Monday to Saturday/Monday to Sunday. Just long press "ALARM", and then use the "UP" and "DOWN" buttons to adjust the hour/minute/snooze time/working day mode. In addition, you can get 1~60 minutes of extra sleep by pressing the "SNOOZE" button when the alarm goes off, or press any other key to cancel the alarm. Voice Control: When Powered by battery, you can get a extra function - voice control, which means you can activate the display by make some noise like clapping your hands, rapping on the table or touching the clock. In addition, the LED alarm clock will automatically turns off after 16 seconds of inactivity. And you need to be aware that it will lose time memory when the power is off. USB/Battery Powered: With a USB cable (included) and 3 AAA batteries (excluded), this LED alarm clock has two power source which is convenient and useful. NOTE: This product is LED light, it is recommended to be plugged in, and constant light cannot be guaranteed when using batteries. You can choose to use USB to charge if you want the alarm screen is always on.