Pursuestar Pull String Cord Clockwork Music Box for Baby Crib Bed Sleeping Bell Kids Stuffed Plush Toys - Brahms Lullaby Sankyo music box, sound quality is excellent, durable. Material: Eco-Friendly ABS and metal music movement inside Size: 5.3cm*4.7cm*3.2cm (2.08"*1.85"*1.26"); Length of the cord: 8cm-30cm ( contract and extend) No battery required. Pull the cord, beautiful music will start, the cord will contract while the music is playing Hanging loop at the top, music box can be fixed. Easy to clean, wipeable with a damp cloth.