Rhythm 4MH408WU19 Peaceful Cosmos II has three musical settings playing one of 12 Popular and Hymns, 12 Americana melodies or 6 Christmas melodies. Swarovski crystal pendulum rotates continuously. Quartz, battery operated movement. Plays 30 Melodies. This clock is equipped with a light sensor, that will automatically silence the clock when your room is dark. Volume Control and an ON/OFF Switch. Two “D” sized Batteries are included.