Compact Alarm Clock] Dimensions 5.7 x 3.1 x 5.7 cm and 42 grams. This travel alarm clock is so small you can easily hold it in your hand. The square clock does not take up any extra space. You only need a little space in your backpack to carry it.Easy settingOn the back there are only two setting wheels, time and alarm, which is a convenient classic design. Turn the wheel to adjust the time and alarm, and the light button is located on the front of the alarm.UNIQUE ALARM SWITCH DESIGNThe alarm on/off switch is located on the top of the small analog clock, easy to reach. Lift to open, press to close. It's easy to tell if the alarm is on or off.[Complete Silent] This small clock runs on 1 AA battery (not included). Since the clock has a silent quartz movement, there are no disturbing ticks. This alarm clock allows you to have a peaceful sleeping environment.