This Rhythm 4MH864WU06 Timecracker wall clock has many quality features. The Solid wooden frame surrounds the black background with brass accents that give this model a classical appeal. The clock will rotate through one melody every hour as the dial separates in half and the inner working spin. The spinning pendulum holds four crystals and keeps a smooth constant rotation. It runs on 2 “D” batteries (included). This movement features a volume control, demo button, on/off switch, and automatic night shut-off.