Only the current MP-73/53 will have the programming in it that allows you to reconfigure the wireless through the controller interface. G3 Wireless can be installed in the following controllers provided the controllers have been upgraded to the current MP-73/53 condition: MP-72, MP-52, MP-70, MP-50, MP-69, MP-68, BB-66, FB-66, BA-41B, and MP-71.