Hi Gary yep you can't use any x10 security
stuff and that's a GOOD THING! I bought
those 8 motion detectors for something like
60 dollars that x10 ahd on sale a while back
and I've tested 4 and all 4 have given false
alarms. Got them setting in the guest room
with a spare console with the door closed
and all 4 have given false alarms within the
past 2 months! It's my understanding that
the Securelinc is very reliable with no or
very very few false alarms, if I had it to
do all over again I would have gladly spent
the money for the Securelinc, plus you can
call the unit from anyplace in the world and
check the status of your home, turn lights
on and off ect, still planning to post the
link to those FAQ, Happy Holidays to
everyone!!!!
Tcj