the alarm clock be small enough and lightweight to carry throughout you trip , and be reliable for the day you need to wake up to catch a plane or bus ride . the clock fold to a compact size that prevent the user from accidentally click the button . when the clock be unfold , the case serve as a stand . the blue glow of the screen be easy on the eye , especially when you eye be accustom to the darkness . use 1 aaa battery , which I do not need to change in 7.5 month . the alarm be loud enough to wake I from sleep without scare I . only quirk about the clock be the snooze function , which allow I to sleep only a extra 4 minute before the alarm go off again .