Since 1978, Slumber Bear has been helping millions of newborns sleep in maternity hospitals and homes worldwide! It is the ONLY audio pacifier with an actual recording made inside a mothers womb! Slumber Bears authentic womb sounds are universally recognized by babies and effective in lulling them to sleep in minutes! Sound box has a 5 minute auto-shutoff timer to save batteries, with sound and motion sensors that reactivate recording when baby cries or the bear is moved. Slumber Bear now comes with Silkie , the natural bonding aid that retains parents scent and reassures baby of their presence. New recordable function allows parents to create their own soothing messages for baby. Helps promote parent/baby bonding There are different sounds to sooth your baby to sleep including lullabies, ocean waves, womb sound and white noise.