Bin ...... encountered by chance on this cat-bell TO HAPPINESS !!!! Right now in the colder months, we need them. The cat had been always a long wait outside the patio door, but since then we have the bell they sit in front of it, "ring" and we open the door. For all practical: cats no longer need to wait until you happen to notice that they are there. It even does not have to constantly call and look for the cat. Just perfect!