This clock has been designed with absolute simplicity in mind and is very easy to operate. Only 2 x AAA battery(battery not included) to make the clock work. Perfect for adults, children, teens, seniors and the elderly. This alarm clock can be set 3 different alarms,convenient for family members with a different schedule.12/24H function is also available. The screen size is 2.0 x 3.3 inches. You can see the time,week and temperature on it. When the clock is ringing,to press backlight/snooze button will enter the snooze mode.It will ring again in 5 minutes.