In article ,
Jim K writes:
so make sure you let it off "by accident" a *few* times
once installed.....

That absolutely guarantees no one will take any notice if it
goes off for real.

My normal recommendation when you install an alarm is not not connect
up the external sounder until you've managed something like 3 months
with no false alarms. That way, you don't destroy any goodwill in
your neighbours with the initial teething problems.

(A wireless alarm might not have an option not to have the external
sounder active, whilst having the rest of the system operating.)

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]