I was looking to add a sensor to my system I purchased a month ago for $50.00 when I came across the entire system including gateway etc for $29.95 at Amazon! To just get the extra sensor it is over $40.00.. Seems like a pretty good deal to me.
First three months of email alerts etc is free then .99 a month. The app costs nothing and subscription only required if you want to continue to receive alerts. App has performed flawlessly for me, and was very easy to set up.
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