Features: 1.STRESS RELIEF: This music box movement offers therapeutic features for kids and adults, watching the little gears move and listening to the music is delightful and stress relieving. 2.18 NOTES: This wind up music movement uses 18 notes to produce pleasing songs and is very easy to use and operate. 3.MUSIC BOX DIY: You can put this music box movement into paper boxes, wooden boxes, glass boxes, plastic boxes and metal boxes to create your unique music box. 4.CLEAR SOUND: Clockwork music box movement is well made for clearer and more durable sound. 5.PERFECT GIFT: You will be very excited after finishing this music mechanism movement, a meaningful gift to yourself and your friends. specification:Item Type: 18 Note Musical Mechanism Movement Material: Acrylic, Alloy Product Use: Suitable for Birthday Gifts, Musical Enlightenment, Etc. Battery: 1 Section of AA Batteries ((Battery Not Included)) Music Song Name: FOR ELISE Size: Approx. 5 x 4.5 x 2.3cm / 2.0 x 1.8 x 0.9in PackageList: 1 x Battery Box 1 x MusicalMechanismMovement 4 xScrew