I am very satisfied with the Guard line products. I bought 2 receivers and 4 transmitters to cover different areas of my property. I have one at the end of my driveway about 300 feet from home and both recuperators pick it up with no problem so performance is great. Although the sound parameters are terrible. I wanted each receiver to sound a little different to differentiate them sonically. I was hoping each of these would have simple beeps or beeps or better yet numbers or other customizable options that you hear on a home alarm system. Instead there is a terrible selection of old school doorbell songs like Big Ben and other old classics that run for too long and would drive my wife crazy if she had to hear them. I gave her the choice and she couldn't stand it either, so at least it's not just me. In fact, only three make sense, which is a shame since I have 4 transmitters. That means I fell into the trap of at least one of them torturing my wife. I chose a place with much less traffic. :) I've had a few other similar models and this one is by far the best in terms of range and performance, just a shame there are no more sound options for devices that are really well made and work great.
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