Large LED DisplayTo keep the light on, please keep it plugged in at all times. Our alarm clock has a large 5.6 inch LED mirror display which makes it easy to read; USB Powered Built-in Backup BatteryWe have provided a USB charging cable for the smart clock for your convenience, and the built-in button battery can save your clock settings in case of power outage; the time display supports 12-hour format and 24-hour format Dual Alarm Clock with SnoozeThe dual alarm clock can set two separate wake-up times. Snooze time can be set, no need to manually turn off the alarm clock. Adjustable Brightness4 levels of adjustable brightness. Large LED digital display, clear and comfortable vision, it will automatically dim from 10:00 to 6:00 in the evening. The LED light will always be on when the USB cable is plugged in. By pressing the "SNOOZELIGHT" button, the display can stay on for 5 seconds Stylish and Simple DesignSize: 17.5cm * 4cm * 7.5cm (6.81.572.95 inches), the stylish and simple mini mirror alarm clock can decorate your bedroom, living room, and can also be used as a mirror when needed.