Hi. For those that have the above alarm fitted by their builder (Simonds Homes fit these as their alarm as standard in an upgrade) you can add to it in 15 minutes a receiver and to fob control remotes for under $120 -
http://www.ebay.com.au/itm/like/Hills-r ... RTM2010730
It took 15 minutes to add. Now my system has 2 fob remotes. Very handy for home invasion. You retire for the night and set the alarm PIRs to on. It will detect intrusion and alarm. The remote can be used to set off the alarm in panic too. Another handy feature in my opinion. It gives me time to grab the machete from under the bed.
I had an alarm company quote $385 to have remote option supplied and fitted. It is an easy DIY project. Any NX4 system built in last 10 years is upgradable even though NX4 is excluded in item description systems product will work with it. Mine is a NX 4 and the remotes work great.