Product review (2 stars): Get something better.  Very good customer service from this company.
Do not like it, but that is just one opinion. One of two I received simply would not work.  Was not impressed with overall product as it does not seem to be top quality.  UPDATE:  Customer service was kind enough to refund my purchase.  Suggest anyone interested in something like this pay them a little more money and get a sensor which is a "step up."