Large LED DisplayTo save energy, the display will light up when there is sound or motion, but not at other times. To keep the light on, keep it plugged in at all times. USB Powered & Built-in Backup BatteryWe have provided our smart clock with a charging USB cable for your convenience, built-in coin cell battery to save your clock settings in case of power failure; time display supports 12 hours and 24 hours Hour format Dual Alarm Clock with SnoozeDual alarm clock can set two separate wake-up times. Snooze time can be set, no need to manually turn off the alarm. Adjustable Brightness4-level adjustable brightness. LED large digital display, clear and comfortable vision, automatically dimmed from 10:00-6:00 pm. The LED light will always be on when the USB cable is plugged in. Press the "SNOOZELIGHT" button, the display can stay on for 5 seconds Stylish and Simple DesignSize: 14.56.53.2 cm (5.72.561.26 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. The PXCL team is at your service and we hope you enjoy your life!