Louis Lion™ Smart Sensor - This adorable lion is a white noise plush that plays sound plush that plays 8 soothing sounds and melodies! These soothing sounds help babies and children go to sleep faster. The Louis Lion™ includes a Smart Sound Sensor. If your baby wakes up and makes any sound, the sensor restarts the music to help baby fall back asleep. When bedtime beckons, the plush easily attaches to any crib by using the hook-and-loop fastener behind its head.