Every hour the colour glowing out of its cube frame subtly phases over to a new one throughout a 12-hour period You can choose to have the light phasing or off or in demo mode where it scrolls though all the colours available & when the alarm goes off youll get an audible tone plus the flashing colour for that hour The tongue-in-cheek retro styling makes it an unusual & cheerful addition to the morning ritual But you could even switch the alarm off & use its gentle glow as a nightlight for the children The alarm clock has a snooze feature