Usage Tips: * Switch on/off button: Button for play/pause function. Press the button to start playing, and press again to stop. Motor operates synchronously with music rotates during playback and stops when paused. * Mode button: Song switching function. Features 12 built-in melodies. Each press advances to the next song; songs play automatically in sequence without input. * Volume button: Two buttons with identical function. Offers three volume levels: high, medium, and low. Each press cycles through the levels for selection. [Adjustable Volume] The baby music box provides 3 fixed volume settings. The crib mobile motor allows smooth volume adjustment from 0 to 100 for personalized sound control. [Soft Music] Includes 12 soothing lullabies, selectable at will. Plays one song at a time. Help your baby relax and fall asleep peacefully. [User-Friendly Design] Automatically shuts off after 30 minutes to conserve power and support uninterrupted sleep. [Compatibility] Fits most standard 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 differences in display screens may cause slight color variation between the image and the actual item. Measurement tolerance: 13 cm.