【3 MODE ROTATING】The crib mobile has 3 modes of music box motors, spinning only, music only, spinning and music, and also volume adjustable (0-100) as a way to meet the different needs of your baby during the day or at night when sleeping; the motor will automatically turn off after 30 minutes to save the battery as well as save your energy.The mobile motor needs 2 AA batteries, not included. 【35 LULLABIES】This baby mobile includes 35 pure music lullabies, not just a musical toy, but also a musical mobile that plays soothing sleep music, which can be used to soothe your baby during the day or at night, while letting your baby explore new sounds and tones. 【EASY TO INSTALL】The clamp-on style can be used on most cots with edge diameters of 0.1 inches ~ 1.8 inches (the claws need to be clamped on harder cot edges or cot T-areas). Our mobile cot fits standard size cots and sets up in minutes. Removable rails make our portable cots very easy to move or store, so you can change the décor of your nursery at any time. 【VISUAL STIMULATION FOR BABY 0-5 MONTHS】 Introduces baby to high contrast images and colors for early visual development with a hanging mobile over little one's crib. The baby crib toys that attach to the crib are high contrast baby toys with 5 different shape pattern (Stars, moon, triangle, cone, cute oval face) which give visual stimulation to engage your baby. 【PERFECT GIFT】 High-contrast black and white colors in our musical baby toys captivate and stimulate your baby's developing sense of sight, makes a great unisex gift for baby showers, birthdays or baby registries. It's not only a musical baby mobile, it's also the cutest nursery decoration.