Title: Don't waste your time on this.
Review: Maybe you'll get lucky and get one that works. I didn't.The light on the sensor comes on any time it detects anything. However, the only way to get the receiver to respond is by turning it off then back on, AND, this doesn't even work most of the time. I tried a couple sets of batteries in each unit, and got the chime to sound a total of two times.The signal is not detected through any wall either.I'd send it back, but it's not worth my time. Thankfully it was cheap.
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