Description Alarm clock with unique mirror big screen design 6.5 inch large LED screen with high contrast display, you can see the time clearly at a glance even it is far away from you. The sleek and simple mirror design perfectly matches your bedroom, office, etc. It can be hung on the wall as a hanging clock. . Two USB charging ports and battery backup This alarm clock has a 5V USB DC power cable input. Two USB charging ports can simultaneously charge two devices with 1A output. The backup battery saves the time and alarm settings only in the event of a power failure. Tip: This alarm clock can only be used when powered by DC power. 3 levels adjustable brightness Highly sensitive light sensor, which can automatically adjust the brightness of the display according to the environment or manually adjust the light as needed. No blinding lights or annoying noises disturb your sleep. Easy snooze function You can set the snooze time as you like, press the big snooze button on top of the watch to stop the buzzer without opening your eyes. The default snooze time is 5 minutes and can be set from 5 to 60 minutes. Warm Tips The clock can keep the time memory when power off, and cant support the digital clock light up. Please remove the plastic insulator tab from the button battery compartment on the back and connect the product to power with a USB cable.