Housebreakers get in when you're least aware of their presence and during unexpected times, so any kind of security system that relies heavily on electric-powered machinery is an off. This is where battery-powered security system matters the most. However, the aforesaid statement doesn't mean to chip away and weaken the credibility of wired ones, for there are power-operated security systems that mechanically swing to reserve batteries the moment power disruption surfaces. But the gist here is: Regardless of which system you go for, one feature that you need to look at in order to determine what is the best home security system is a type that no power interruption could ever downplay in terms of functionality and performance. The best home security should have these three layers of defenses in your system. First, the window and door locks for outside protection, second are motion detectors as defense for the inside premises, and lastly, the smoke and heat sensors. If you have these three in your home security system, you need not look for more. Third-party involvement - What is the best system to select on? It should definitely have third party monitoring. The third party is either the installation company catering extended services to their clients or law enforcements themselves. This ensures homeowners that they are fully protected.