Samyo Baby Crib Baby Bedding Battery-operated Musical Mobile Plays 35 Tunes (Without Arm) Plays 35 Beautiful Tunes(not the entire song) with the mobile slowly rotating. Can be installed on baby's bed, Just the mobile without arm. Easy to operate. The red button is for on/off,the green button is for next song. Battery-operated by 2 AA batteries(Batteries not included). Material: ABS without pollution. Color: White.