?AC 120V Electric Powered & Battery Backup?This is outlet powered only. Both adapter (US Plug) and USB cable (length: 5 FT) are included. Cell button (included) is work for memorizing the settings in the case of the main power outage. During battery back up the screen goes blank but alarm and time settings are retained. ?Convenient USB Charging Port?The could serve as a convenient at bedside. 2 USB ports on the back allows you to charge cellphone,tablets and other electronics devices simultaneously, solving the problem of not having enough charging ports or taking up socket resources. Flexible and convenient. ? ?DUAL ALARM & SNOOZE MODE?Considering that everyone have different schedules despite being a family, we designed this with dual alarms, allows you to set 2 separately alarms on the same day. In addition, the big snooze button on the top can help you turn off the buzzer easily without opening eyes and enjoy extra 9 minutes of sleep. The alarm will go off again in 9mins to prevent you oversleeping, perfect or deep s. ?Adjustable Volume & Display Brightness?Different people have different needs on alarming sound and display brightness, control of sound and brightness really matters. Our has 7 levels of alarm volume adjustment that can be set from 92-110dB, perfect for or those with poor hearing. The display supports 7 levels of brightness adjustable from 5% to 100%, which is vision friendly, no blinding lights disturb your sleep. ? ?LARGE MIRROR DISPLAY & MODERN DESIGN?Features with the super large 8.7 inches LED screen, the big number on the is easy to check anywhere in the room or even for senior and the near sighted. Unique PC mirror technology also make the clock can be used as a mirror for your beauty and makeup. Moreover, the sleek design can match with any decoration, not only works for bedroom, office and living room, also a unique gift for your kids, families or friends.