Rhythm Clocks "Gadget" Magic Motion Clock, Black Beautifully displayed gears adorned by 6 genuine Swarovski crystals of varying sizes that sparkle as the contentiously moving pendulum gear near the bottom and flashing LED lights create a unique display Every hour on the hour the face of the Gadget clock comes to life making a full revolution while playing one of its 30 melodies including 12 popular melodies, 12 classic melodies or 6 Christmas songs for you to enjoy Optional volume control, On/Off switch and display button lets you silence your clock on demand, while it still keeps perfect time Not only does the Gadget tell time, but it also includes a temperature gauge and Hygrometer (humidity measurement) with an optional volume control, On/Off switch and display button lets you silence your clock on demand, while it still keeps perfect time Clock measures 16.1" high by 15.4" wide by 6" deep and operates on two D batteries that are included to help keep the clocks precision Quartz movement