Push Button Doorbell, no video

I have what appears to be a wireless push button door bell.  We replaced the battery and it is still not working.  It has two pin settings and a small circuit board.  Looking through the Simply Safe web site I find no information on older Simply Safe equipment.  I am the second owner of this home and the previous owner left no documentation on the makeup of the system or how it works other than the password.  I would like the doorbell to work. Please help, thank you.