【Compact Alarm Clock】 Measures 5.7 x 3.1 x 5.7 cm and weighs 42 grams. This travel alarm clock is so compact that you can easily hold it in your hand. The square-shaped clock does not take up any extra space. You only need a little space in your backpack to carry it.【EASY TO SET】 There are only two setting wheels on the back, time and alarm, it is a convenient classic design, turn the wheel to adjust the time and alarm, the light on is located on the front of the alarm clock.【UNIQUE ALARM SWITCH DESIGN】 The alarm on/off switch is located on the top of the small analog clock and is easy to reach. Boost is on and press is off. It's easy to tell if the alarm is on or off.【Complete Silence】 This hourly clock runs on 1 AA battery (not included). There is no disturbing ticking sound as the clock has a silent quartz movement. This alarm clock will give you a quiet sleep environment.