【3 Modes】The crib mobile music box is different from other motors. It has 3 modes, rotation only and music only. Rotation and music at the same time. UNIQUE on the market. 【Portable Sound Machine】With a diameter of only 3.4 inches and 3.6 ounces, the motor easily fits in a diaper bag or backpack. 【Arbitrary Volume】The traditional baby music box has only 3 volume levels. The FEISIKE crib mobile motor has stepless volume, you can choose the most suitable volume from 0 to 100. Say goodbye to the traditional mobile music box. 【Soft Music】Includes 12 pure music lullabies that compared to white noise, the lullabies are faster for babies to relax and get cozy. 【User-Friendly Design】Automatic shutdown after 30 minutes 【Compatibility】Fits most crib mobile hangers, crib mobile arm. 2 AA batteries are required, not included. We are responsible for the product, and contact the seller for product problems and technical support.