EXTREMELY SIMPLE TO OPERATE - The cool clock has been designed with absolute simplicity in mind! Easy for boys, girls, toddler, kids, teens, seniors and the elderly. LOUD ALARM AND SNOOZE - The bedside alarm clock comes with one of the loudest alarms available which can be set at Low or High in volume. There is also a 9 minute snooze that can be continually pressed until the alarm itself is switched off JUMBO ILLUMINATED LED DIGITS WITH HIGH/LOW BRIGHTNESS - The red numbers on the clock are very clear with extra bright quality, easy to see! If desired, there is a high/low option to set the brightness to your own personal comfort level. AC 120V ELECTRIC POWERED, WITH BATTERY BACK UP - To power the clock, just plug the power cord into a standard US 120V outlet (do not use with 240V) and you are good to go. Use one 9V battery for back up in case of a power outage. During battery back up the screen goes blank but alarm and time settings are retained and the alarm will still sound. Compatible with SHARP Brand Extremely Simple to Operate Loud Alarm and Snooze Jumbo Easy to Read Display Silver Case | White LED Display 90 Degree Swivel Case for Best View 6.25" X 2.15" X 4" Compatible with SHARP Brand Extremely Simple to Operate Loud Alarm and Snooze Jumbo Easy to Read Display