GE 19200 Installation Instructions Manual page 4

Each component has jumpers for setting the house security code:
The chime and pushbutton must be set to the same house security code for the
combination to operate together.
Note
: The push button has 3 additional jumpers that are used to set the chime
tune that will play. The chime tune jumpers do not affect the house security code.
1. Remove power or batteries from the chime.
2. To remove the batteries from the pushbutton, open the pushbutton case
as shown below.