Hi, thanks for your reply.
I got these sounders as my understanding is that they will mimic the sounds of the Enforcer main panel, e.g, the entry/exit sounds (as I am installing the two sounds in two detatached garages) and also to keep the brands the same, the Enforcer is Pyronix and so are the Twin Sounders.
I'm not really fussed about the tamper for these as the will be in high places and unreachable anyway.
Thanks