This security cam is your protector against smoke, C02, and strangers.

The Blue Indoor Camera is one of three home do-it-yourself security cameras from ADT. The camera is USB powered and comes with support for motion zones and facial recognition to help cut down on the number of irrelevant alerts you might receive.
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https://www.techhive.com/article/3534522/adt-blue-indoor-security-camera-review.html