Plug-In Electric Operation: Powered By A USB Cable For Smooth And Accurate Performance, Ensuring Time Is Always On Point. Auto Dimming Function: The Clock Automatically Adjusts Its Brightness Depending On The Time Of Day, Offering Comfort In Bright Light And Reduced Glare At Night. Backup Battery Alarm: Equipped With A Built-In Button Battery For Memory Backup, So Settings Are Preserved Even In Case Of Power Failure, Keeping You From Oversleeping. High Contrast Screen: The Black Background With White Digits Ensures High Visibility And Clarity, Making It Perfect For Seniors And Those With Visual Impairments. Easy Setup: Time Memory Function Means No Need To Reset Time When Power Cycles, Providing Hassle-Free Operation. Stay on time effortlessly with our plug-in electric clock. Featuring automatic brightness adjustment and a backup battery alarm, it's designed for heavy sleepers and anyone who values reliability. Say goodbye to manual adjustments and hello to peace of mind. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.