Features: ☆ See the time on a realistic Big Ben clock face ☆ Prevent screen from locking so you can view Big Ben all day long ☆ Sound plays at 15, 30, 45 and on the hour just like the real Big Ben ☆ Watch a countdown to the next chime in minutes and seconds ☆ Learn about the history of Big Ben ☆ The sky changes to match sunset and sunrise