The compact keychain sensor allows you to keep tabs on when family members come home (ie. kids returning from school).  Photo 6 of 6 in Sleek and Practical Smart Home Tech from Belkin at CES 2015 by Diana Budds

Sleek and Practical Smart Home Tech from Belkin at CES 2015

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The compact keychain sensor allows you to keep tabs on when family members come home (ie. kids returning from school).