Otto the otter turns your little one's bedroom into a magical underwater world. Otto projects swimming fish and moving waves on your ceiling while playing relaxing melodies such as ocean sounds, mimicking a mum's heartbeat and lullabies. Its unique 3-step sleep program could your little one with dozing off in 30 minutes., , Step 1 (0 - 10 minutes) Orange swimming fish, moving waves and soothing ocean sounds., , Step 2 (10 - 20 minutes) Lower brightness, moving waves but no more orange fishes and only underwater bubble sound., , Step 3 (20 - 30 minutes) Static waves, no fish at all, no sound. After 30 minutes the sleep programm automatically switches off., , Otto's cry sensor enables step 2 of the sleep program. You can remove the plush from the projector, the latter is powered by 3x AA batteries (not included).