Windup Music Box: No batteries needed. Rotate the bottom knob to wind up, then it will play Merry Go Round of Life . It can also be a home decoration to complement your room or party. Easy to use: No age limitation, the tiny wood music box can be enjoyed by anyone, both adults and children. You can see the 18 Note gears and how it works. Beautifully-carved Crafts: The music box is made of wood, compact and high-quality. The exquisite surface is laser engraved with pictures which makes it looks beautiful and lovely. Tiny Size and Light Weight: This music box is about 6.4cm*5.2cm*4.2cm (2.52"*2"*1.65"),Its compact size makes it easy to take on-the-go, while its timeless appeal makes it a cherished keepsake for years to come,Weight: About 90g. Great gift ideas: The best gift for music box for your friends, spouse, sweetheart,relatives, or yourself on Christmas, New Years, birthday,anniversary, wedding or Valentine's days.