Calming nature sounds, soft lights & lullabies. Naturally soothing, with underwater sights and sounds! Three settings: fascinating motion of “swimming” fish and flowing bubbles as aquarium gently glows; tranquil, rippling waves projected on baby’s ceiling; or a combination of both. You can also choose from a selection of two lullabies or four soothing aquatic sounds: splashing fish; ocean waves; the pitter-patter of rain; or a babbling brook. Attach to crib or set on dresser top. Requires 4 “C” alkaline batteries (not included).