Nighty Night Owl Smart Sensor Sound Machine Type_Storage full coverage wind shield protects head Engineered for walking full coverage wind shield protects head to toe from rain dishwasher safe Key Features: Plays 4 Soothing Sounds and 4 Peaceful Melody Options: Mother's Heartbeat Twinkle Twinkle Spring Showers Rock a Bye Baby Ocean Surf Classical Lullaby Whale Songs Tranquil Melody Responds and restarts its soothing sounds when baby vocalizes Three sound sensitivity levels to adjust the sensor to environmental noise Restarts from the last melody played at the same sound level last selected Adjustable volume Scientifically proven to promote better sleep Two sleep timer options with auto shut off: 23 and 45 minutes Velcro tab for easy attachment to baby’s crib Super soft polyester plush Removable white noise machine Can be machine washed and dried when sound machine is removed Requires 2 AA batteries (included) Recommended for ages 0+ A smart choice for sleep deprived parents