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Lithium sensor batteries, for example, can last three to five years. When they do run low, the system lets you know well in advance. Choose a controller with back up battery so the system will stay active in the event of a power outage or if the Internet is down. If you will be installing smoke alarms you’ll need the extra power of a 24 hour battery back up, not the 4 hour back up offered by many manufacturers. THE COST FOR SECURITY There are two costs to keep in mind when shopping for a home security system. The first is for the equipment and the installation, if you’re having it done by a professional.

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Service may require credit approval. Additional charges apply for premium services, TV Paks, extra TVs connected to Cox Contour TV service, PPV events, sports packages and On Demand titles. Not all services and features available everywhere. A credit check and/or deposit may be required. Additional fees and other restrictions may apply. Netflix streaming subscription and Cox High Speed Internet required to access Netflix through Contour. Netflix usage counts toward Cox data plans and is subject to the Netflix Terms of Use at ermsOfUse2 Year Term Service Agreement Your service agreement will be for 24 months. You may cancel within 30 days of start of agreement to avoid an early termination fee ETF by calling Cox Customer Care at the number located on your bill. After that, you will be charged up to $240 if you cancel the agreement or TV, Internet or Basic Phone is disconnected. You can change other services, features and equipment without affecting your agreement. The full text of the service agreement is on cox.