What is the jumper that came with my SAT3T5 1st Gen Ring for

What is the jumper that came with my SAT3T5 1st Gen Ring for?
also can my ring also operate my existing old ringer that was operated from the original button

Hi @PapaJim. Is the Video Doorbell Wired the model to which you are referring? If so, the Jumper Cable needs to be installed into your pre-existing chime in order for the Doorbell Wired to work correctly. This Help Center page will show you how to install the Jumper Cable. Also, this model Doorbell cannot ring any pre-existing chimes.