Feature:1. Ideal Choice: This music box movement could be your ideal choice if you are tired with hand crank music box and don't want to keep cranking.2. Easy to Use: This electric music box movement with 18 note is powered by 1 pieces of AA batteries(battery not included).3. Therapeutic Function: This battery music box movement features therapeutic function, just play the movement on the desk, seeing its gears move, listening the pure tune, very interesting.4. Music Box DIY: This musical box movement can be installed in paper box, wooden box, glass box, plastic box and metal box, then you can create a unique music box.5. For Elise: This musical box DIY movement produces beautiful "For Elise" melody, listening to the music, soothing to the ears.Specification:Item Type: Music Box MovementMaterial: Acrylic, Alloy Application: Suitable for Gift Making, Music Enlightenment EtcBattery: 1 x AA Battery (Battery Not Included)Movement Size: Approx. 5 x 4.5 x 2.3cm / 2.0 x 1.8 x 0.9in ( Manual Measurement, Slight Error May Exist ).Package List:1 x Battery Box1 x Music Box Movement