Digital Alarm Clock, Large Mirrored LED Display, Snooze Function Dim Mode, Wall Mounted Bedroom Desk Clock (White) Simple operation: There are only 3 buttons to help you set the time, alarm, brightness, and the operation is simple. So you won't get confused with multiple buttons. LARGE DISPLAY AND MODERN DESIGN: 6.5" (about 16.5cm) large LED display with large numbers for easy time reading. The stylish design makes it perfect for your room decor. Manual and automatic brightness adjustment: We offer three brightness levels to provide dim brightness at night without disturbing sleep. Or you can select Auto Brightness to automatically dim the brightness at night. Dual USB Charging and Memory Batteries: 2 USB charging ports can charge two devices at the same time. A backup memory battery (included) stores time in the event of a power failure. Tip: This clock can only be powered by USB. Super convenient snooze button: big snooze button, you can turn on the snooze function without opening your eyes, fall asleep easily, can be set for 5~60 minutes.