Help soothe your baby to sleep better with the first portable soothing mat. Invented by a maternity nurse and infant crying Specialist, the Baby Brezza Smart soothing mat is the only mat that mimics the sounds & motions of the womb, which triggers your baby's natural calming reflex and turns on their natural sleep impluse. You can use the free app to operate the mat via Bluetooth and customize the settings to your baby's liking including 4 vibration vibration levels, 4 heartbeat modes and 5 timer settings (15 min, 30 min, 45 min, 60 min, continuous). the mat features a water resistant interior lining and soft, removable and washable polyester/spandex cover and uses 4 AA batteries. it's pediatrician-recommended & award-winning (featured on Shark Tank & semi-finalist in National sleep foundation's 2019 sleep Tech awards). plus it's lightweight and rolls up for on-the-go and is the perfect size for cribs/bassinets/activity mats.