2. Easy to Install: You don't need to use glue or tools. Just place it between the crib bars and screw the closing disks tight.Assembly time 1-3 minutes.When not in use you can take them apart for compact storage. 4. Baby Companion: home baby mobile creative a personalistic fun play space and sleeping atmosphere for your baby, make parents more relaxed to take care of their little one. 5. Upgraded Arch Base: Unique base can be attached to baby crib more stably, you can attach it to any flat surface. A small wooden block is used together to increase friction and protect the crib from scratches. 3. Adjustable and Rotatable: the top of the crib mobile arm with adjustment button, which can be adjusted in height and rotated 360 degrees, you can turn the button to adjust it to the position suitable for the baby to see the mobile or move it out of the way to have convenient crib access. 1. Good Quality: this baby crib mobile holder is made from ABS, sanded smooth, natural, unpainted.