Swarovski Crystals are embedded in multiple locations on the dial with 15 more behind the dial and 16 on the rotating pendulum. Solid hardwood frame. At the top of the hour the dial opens into 6 sections revealing instruments and music notes that rotate to one of 30 well known melodies. . This clock requires 4 D size batteries which are included. The music has an on / off switch and a Light Sensor Shutoff so the clock may be silent in the evening hours. There is also a volume control for the music.