Dex Mommy Bear with Womb Sounds, Volume Control and Auto Shut-off, Tan/Light Brown Teddy VOLUME CONTROL - A small knob on the back of the bear allows you to change the volume depending on you and your babies desires. AUTO SHUT-OFF - 2 AA Batteries included with a battery saving feature that will shut off the sound box after 40 minutes. WASHABLE - The sound unit is fully removable so you can wash your teddy and pass down from child to child. SOOTHING SOUNDS - Ease your baby to sleep with the familiar sounds of the womb. SAFELY SECURES - Super strong velcro keeps the bear safely attached to the crib.