1Clockwork movement, tighten, open the piano cover, you can enjoy music no requirement of battery, environmental friendly. 2Own good oxidation resistance, the color is bright and not easy to dirty. 3With the exquisite workmanship,delicate texture,the product is fascinating. 4The music box own an elegant style,matched with cheerful melody,full with the sense of romantic poetry. 5A perfect birthday wedding gift for your friends,classmates,colleges.A charming ornament for your home.