Adjustable BrightnessClear and comfortable visual sense, it will automatically dim at 6:00pm. The LED light will always be on when the USB cable is plugged in. When using battery mode, the screen will automatically turn off after 10 seconds. Snooze FunctionWhen the alarm clock sounds, you can press the snooze button and sleep for another 5 minutes. The digital clock will chime every 5 minutes until you press another button to turn snooze off. Snooze time can be set from 1-60 minutes (default snooze time is 5 minutes). Digital ClockLarge Display: This digital alarm clock has a large 6.7-inch LED mirror display, which is one of the best bedroom alarm clocks due to its simplicity. This premium digital clock is something you'll love waking up to every morning. The LED display is as clear and modern as the mirror screen, showing the time and temperature in an easy-to-read manner. USB Alarm Clock & Extra BatteryThe alarm clock can be powered by a USB cable or 3 AAA batteries (not included). Best Gift and Satisfactory ServiceThe alarm clock is a perfect gift for family and friends. Perfect for decorating your home or nightstand for everyday use. If you receive any questions, please feel free to contact us. We will solve the problem as soon as possible.