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http://www.ohgizmo.com/2012/12/10/doorbot-shows-you-whos-at-the-door-and-lets-you-tell-them-to-buzz-off-if-theyre-unwanted/
Marie D5
Marie D5 May 05, 2013
http://www.ohgizmo.com/2012/12/10/doorbot-shows-you-whos-at-the-door-and-lets-you-tell-them-to-buzz-off-if-theyre-unwanted/

I've seen these sensors...

Often 0
Occasionally 2
Rarely 2
Never 6
What is it? 1
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