Soothe your fussy baby with Baby Shusher, the sound machine that lulls babies to sleep with a real human voice. Baby Shusher uses a rhythmic "Shhh" sound to break a baby's crying spell. For newborn babies, this mimics life in the womb where babies hear tons of sounds throughout the day. It's much more effective than just using white noise. The sound can be set for 15 or 30 minutes, depending on your baby's needs. Simply twist the top section to select the time you want. The Baby Shusher is wireless and portable, so it goes anywhere baby goes. Each device comes with a handy wrist strap making it easier to carry or tether to the car seat, and is ready to use right out of the box with 2 AA Duracell® Batteries. EUC, comes with travel case. Slight markings due to storage, as shown in photos.