This teddy bear has a multiple choice, timed sound mechanism which plays a heartbeat sound, a wave motion sound, a rain sound or a twilight sound. It has a Velcro strap so that you can adjust it in a safe and secure place. Sound machines aren’t just for babies, baby😜 Perfect for any season Good used condition. I listened to it and all four sounds work. Please view all pictures. Bundle anything in my closet and save on shipping. F1