This travel alarm clock has a crescendo audio alarm and a vibrating alarm setting. The alarm stops automatically after one minute, or when the "OFF" button is pressed. A "Light/Snooze" button turns on the LCD display light for viewing the time in dim light. It also snoozes the alarm for four minutes when the alarm goes off. Uses 3 AA batteries (not included). Ninety day warranty. Features: Time display: 1/2" H numbers Alarm display: 3/8" H numbers Display shows current time and scheduled alarm time Dimensions: 4-1/4" W x 1-1/2" D x 2-3/4" H