From website The Baby Shusher is a sleep sound machine that calms fussy, crying newborns with a repeating "shhh" sound. The same sound you speak to calm them during their crying spells. Twist the top to turn it on. Twist the base to match the volume of baby's cries. Watch this soothing machine calm down your crying in seconds. The Easiest To Use. Incredibly Effective. No App Required. Pediatrician Recommended. It is simply the sound that works. — Great condition