* Switch on/off button: Press once to play, press again to pause. Motor rotates when music plays and stops when music is paused. * Mode button: Switch between 12 built-in songs. Each press advances to the next song. Music plays automatically if no button is pressed. * Volume selection button: Two buttons with identical function. Cycle through high, medium, and low volume levels with each press. [Arbitrary volume] Unlike traditional baby music boxes with fixed 3-level volume, this crib mobile motor features stepless volume control from 0 to 100, allowing you to select the ideal volume for your baby. Say goodbye to conventional music boxes. [Soft music] 12 soothing lullabies that can be freely switched. Skip to the previous or next track. Choose your baby's favorite melody for a peaceful sleep. [User-friendly design] Automatically shuts down after 30 minutes to conserve battery and promote uninterrupted sleep. [Compatibility] Fits most crib mobile hangers and crib mobile arms. Requires 2 AA batteries (not included). Color: White Material: ABS Size: 14 x 9 x 3.5 cm Package Contents: 1 x Music Box Note: Other products not included. Due to lighting and display differences, the actual color may vary slightly from the image. Measurement error allowed within +/- 1-3 cm.