Large Display Electric Alarm Clock with Brightness Dimmer: Corded plug in clock with compact streamline design yet large number display. 2” jumbo illuminated LED digits ensure the time is easy to see even for impaired vision people. The brightness dimmer allows you set the brightness of display, needless worry the brightness, either too bright thus affecting your sleep or too dark to read time. Adjustable Alarm Sound: Single alarm setting with 9 minutes snooze. No harm “ beep” alarm sound can be set from 30-90 DP as person preference . Needless worry the alarm sound, either too loud thus frightening you or too low to wake you up from deep sleeping. One simple ON/OFF button allows you disable the alarm on weekend. USB Charging Port: Convenient USB port allows you to charge your smartphone , ipad or other smart device without plug in wall. handy, convenient and organized. Easy Operation Clock: Intuitive setting button, experience zero stress when setting the time or alarm. Easy for kids, seniors and the elderly. Outlet Powered with Memorized Battery Backup : Plug in to power the clock with the included DC adapter . 2* AAA batteries ( not included ) needed for storing time and alarm settings in case of power outage. With backup battery power source only, the screen will go blank and alarm will not sound.