What you see here is basically a doorbell.
It is a wireless call device that lets us know when Laura is ready to get up on the morning, or needs other help. I suspended it from one of the bed slats wedged between the foot board and mattress so she can use her toe to ring the bell.
Since she cannot reach out with her hands while laying down, this provides a way to send a signal with her feet. It worked perfectly today in our trial run!