Talk with your local police. in most cases, they will recommend a professionally installed hard-wired system on new construction (where the cost of running the cables through the framing is relatively modest compared with the snaking and drywall repair on existing structures. Even if you go for the new new wireless systems, the installation of the window, door and glass-break sensors is important and a professional might cost a bit more but will provide you with more reliable service of the long-term.
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