Good locks on all outside doors and first floor windows are essential to a home’s security and will go a long way towards discouraging burglars. (1)_________________________. Although this will not always prevent entry by a professional burglar, it is often enough to scare off thieves who account for a high percentage of residential break-ins。
Security alarm systems have all been available for many years and have long been common in commercial and (2)______________________. But until the last few years, these system were almost always professionally installed because they required complicated wiring techniques, individualized design and sometimes lots of carpentry---all of which made them expensive。
(3)_________________________. These systems come with detailed installation instructions and usually do not require inside-the-wall-wiring。
