Max the monkey is a soft toy with a removable light module inside its belly. This makes it easy to wash the plush animal. The light module shows a soft glow and can play 3 different melodies as well: lullabies, lounge music and nature sounds. You can adjust the volume from low to high. The light and music shuts off automatically after 20 minutes. The light module is powered by 3x AAA batteries (not included).