By adding alarm components to your system, you assure that you have your whole property covered. The benefit of choosing a wireless system is that you can never outgrow your system. If you get a larger home or apartment, simply add extra sensors to expand your system's coverage. By offering additional components, you're able to buy a minimalist system initially, and then add to it as your needs change.. Remote controls, window and door alarms, two-way radios, portable receivers and wireless smoke detectors are but a few of the items from which to choose.