Innovative, musical cloud light features 8 soothing melodies as well as a soft heartbeat and natural rain sound effects, so that your little one can go to sleep faster. Sound sense control can automatically reactivate if the baby wakes up and starts crying. Features 3 lighting settings: bright, weak and a gentle pulse, plus you can set the night light mode to turn off automatically after 1 or 20 minutes, depending on your baby's sleep patterns. Adjustable length strap allows for different heights, and can be attached to a crib, car seat or stroller. Designed to restrict sound output, which makes it safe for young ears. Requires 3 AAA batteries (included). For ages 0 months and up.