1. quality made, expensive looks.2.The sound power from spring, use the key to turn the spring tightly, then release and will be playing. Full playing time will be 1-2 minutes. When you place it in a box or on a surface and the sound is definitely louder and fuller 3.If you are tired with hand crank music box and dont want to keep cranking, then this windup music box is your best choice and can make you relaxed 4.Therapeutic function for kids and adults - holding this little music movement, winding it, watching the little gears move, and listening to the music, which in itself is soothing to the ears.5.You can install the movement into a DIY box, such as paper box, wooden box, glass box, plastic box and metal box, you can create your own music box. You will be very excited after finishing your artwork. And it is also a precious and meaningful gift for yourself and your friends. Or you dont need to put it in a box, the movement on the desk, seeing its gears move, listening the pure tune, very interesting Colour:goldMaterial:alloySize:5.0cm x 4.5cm x 2.1cmPackage Contents:1 x 18 Note Windup Musical Mechanism MovementOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.