Home security system by Canary, $249 at canary.is This all-in-one security system "learns" the rhythms of your home and monitors activity and noise levels, air quality and temperature, notifying you by text (with an accompanying high-definition video) when anything seems out of sorts. Photo 3 of 11 in Holiday Gift Guide 2014: For the Tech Geek by William Lamb

Holiday Gift Guide 2014: For the Tech Geek

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Home security system by Canary, $249 at canary.is

This all-in-one security system "learns" the rhythms of your home and monitors activity and noise levels, air quality and temperature, notifying you by text (with an accompanying high-definition video) when anything seems out of sorts.