I needed something to let me know when my pet was at the back door waiting to get in, and this works great for that. I put it under a bench near the back door, and when my pet comes toward the door, I hear the chime and I can go and let him in. It is really great that both pieces use batteries and no electricity, so it is totally portable, and I can take the alarm to whatever room I want in the house. The chime can be set high or low, and can be turned off when not in use. I can imagine other uses for this product, such as alerting a parent when a child gets up in the middle of the night. I have only had it about a week, so I have no idea how long the batteries last, but it uses inexpensive batteries. I almost did not buy this because it is called a driveway alert, but it works great not only for driveways, but as an alert for people and pets at the back door too.
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