Nighty Night Owl Sensor assists in giving your baby a good night’s sleep. You will have sweet dreams knowing that your baby will be content and cozy all night long. If your baby wakes up in the middle of the night, a built-in sensor with sound-activation, will soothe them back to sleep. The Nighty Night Owl provides white noise, which is the key to taking out the restlessness in your baby’s night. The soothing sounds of the Nighty Night Owl include a mother’s heartbeat, spring showers, ocean surf, and whale songs. The Nighty Night Owl operates on two AA batteries, and it can be set to shutoff in 23 minutes or 45 minutes.