Finally my brother-in-law’s house had the home security system installed. Hubby recommended him to install a home security system instead of renovating the rooftop to prevent thieves from entering. Now, his new home security system allows him to turn on or off his house lighting through mobil phone or fixed line telephone. This additional feature is very good. While you are away from home, you can switch on or off your house lights, pretending to be at home. The overall installation was professionally done, where the installer managed to minimize the visibility of the cable ducting and hide most of the cables. My BIL had chosen the unconcealed type of installation.
After this installation, we hope he could sleep soundly. :)