Not close to as advertised. this device has never worked 100%. It is intermittent at best and by that, I mean, today for example it hasn't worked in over 3 weeks, today my wife left, it didn't work, but when she came home 3 hours later it did work. In between her departure and return, I've had two deliveries and the mail man, none of which it sounded off when they came or when they left. I've been in touch with them, and they are nice, but there's nothing they can do. It is setup correctly or it wouldn't work at all. It's just not a dependable product. I was hoping it was, but I was disappointed. I would not recommend it.

Its been working fine until it suddenly started to constantly transmit. Unplugged and plugged in the receiver. Changed the dip switches to match on both transmitter and receiver, replaced batteries in transmitter, lowered the sensitivity to almost the lowest setting. It still transmits constantly. It has worked for a couple of years.

Great Product at a great price! Very easy to install! It sips the 2 aa battery.

This works very well