Parts List: 1 x Baby Crib Mobile Arm 1 x Music Box Detailed description: Description. Our crib mobile holder is used to hang bed bells, freeing parents' hands and providing companionship for baby. The anti slip design ensures that the holder is stable and safe, and the music box helps to promote baby's auditory and visual development. Key Features Soothe Baby's Emotions: The crib mobile arm is used to hang the crib bell, soothing baby's emotions, helping baby get rid of boredom and fall asleep quickly. Safe and Reliable Fixing: The crib bell holder is made of natural wood with rubberized plates to provide a strong and secure fixing. Specification Product name: Baby Crib Mobile Arm Bed bell holder material: wood, size: 68 x 31.6cm Music box material: plastic, size: 6.5 x 10.5cm Music box function: pure mechanical, clockwork drive without batteries, after winding up the piano-like clear and soft music ringing, and crib bracket supporting the use of infants to help infants auditory, visual development, the development of young children's intelligence Notes: 1.There may be slight differences between the picture and the actual color of the commodity. We will try our best to show you the exact color. 2.Please allow slight dimension difference due to manual measurement.