If you have an alarm company representative knocking on your door trying to sell you a contract, make sure you're explicitly clear on understanding upfront fees. You might be paying more out of pocket than you'd like. However, some top tier home security companies won't charge anything for installation or activation. Check out our home security reviews if you want to to learn more about the top rated home security companies. It's normal for a home security company to lock you into a three to five year contract. A three year contract is more convenient because a shorter contract means more versatility for you.

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How We TestedFor our video doorbell testing, we installed each unit in our smart home lab, which allowed us to test six of seven smart doorbells simultaneously.

• home monitor systems
• alarm systems
• security door systems

In some implementations, the image sensor for the doorbell camera 106 is less sensitive to 940 nm light than it is to 850 nm light.

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