Negative Positive
Title: Great, but had to be replaced once
Review: The great thing about this product is the 2 wire system, that simply connected using the same wiring that we already had for our doorbell. The ease of use is excellent. Has provided a lot of security, especially for our secretary who may be alone in the building at times. I liked it so much that when the one that we had originally purchased broke (after warranty), I bought and paid for a second one.
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