Large Number Display with Dimmable - (Dimension:5.12 x 2.64 x 1.4) The time display of this alarm clock digital is white and has large figures which is ideal to read from any distance and clearly at day and night. And there are six settings to the brightness of the display with this digital alarm clocks bedside mains powered. USB Charging & Built-in Backup Battery - There is a USB charging cable included for the power supply(No Adapter) and built-in Li-ion battery, the bedroom clock ensures long standby time after fully charged. A built-in backup battery to save the settings of your recharging clock in the event of a power failure. (Attention: Please connect with the USB port or ONLY 5V/1A and 5V/2A adapter to charge the clock) 6-Level of Adjustable Night Light & Silent Push Button - This alarm clock digital has 6-level adjustable surrounding light which is operated by the slightest touch of the silent button. There are blind spots on the buttons which you can easily find and set up even in the dark. Mains Powered & Memory Function - This alarm clock digital mains powered only and built-in battery keeps the memory of all settings during a power outage. And the digital alarm clock bedside mains powered includes a 100V-240V universal AC adapter for use just about anywhere. Easy to Use & Stylish Curved Screen Design - For this alarm clock digital, setting up is an absolute doddle and can be completed in under a minute, friendly for kids and the elderly. Modern and stylish curved screen design make it a perfect holiday gift for your kids, parents or friends.