* Switch on/off button: Press once to play, press again to pause. Motor operates in sync with music—rotates during playback and stops when paused. * Mode button: Switch between 12 built-in songs. Each press advances to the next song; songs play automatically if no input is given. * Volume selection button: Two buttons with identical function for adjusting volume. Cycle through high, medium, and low levels with each press. [Arbitrary volume] Unlike traditional baby music boxes limited to three fixed levels, this crib mobile motor offers stepless volume control from 0 to 100, allowing precise adjustment for your baby's comfort. [Soft music] Features 12 soothing lullabies that can be freely selected. Navigate to previous or next track easily. Choose your baby’s favorite melody for a peaceful sleep. [User-friendly design] Automatically shuts down after 30 minutes to conserve power and support uninterrupted rest. [Compatibility] Fits most crib mobile hangers and 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: Light reflection and display differences may cause slight color variation between image and actual item. Measurement allows an error of +/- 1-3 cm.