Rhythm Twilight Castle Musical Motion LED Lights Up Mantel Clock in good working condition. Takes 4 C Batteries. This is a vintage Rhythm musical motion mantel clock called “Twilight Castle”. It features a stand-out shape and design, with a clear castle inside of a plastic dome over the top of the clock. While the music plays at the top of the hour or the demonstration button is pressed, the castle comes to life and spins while multicolored LED lights shine through it. It plays several different musical pieces. It is about 10 inches in height.