Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Can anyone tell me, after 48 hours of working perfectly, this morning getting false alarm after false alarm?
Document: No good for me, goes off all the time, no one there! Got tired of listening to false alarms 50 times a day disconnected it and bought the hose driveway alarm that actally works when someone drives over it.
I will upgrade this review to 5 stars if it keeps working well over time.
We bought this for my elderly mother so that she feels more secure living alone. She is very content and liked the fact that there were options on the volume level and the sound that it makes so she could easily tell it apart from her regular doorbell and phone sounds.
This device is awesome. I am a painter and I often am in my basement working on my art. I was unable to ever hear the doorbell when I was in my studio. My daughter would always forget her and would be locked out of the house. She would bang on the door and ring the bell to no avail. I bought this doorbell and put the monitor in in my studio and problem solved.
This motion sensor is a life saver. There have been a rash of break-ins in my neighbored, but specifically on my street. I bought this device to try and deter any burglaries to my home. The very first day after I received my motion sensor, my son, who is 13, was home alone and the alarm went off. My son immediately called me and I called the police, who arrived in minutes. They found jimmy marks on my window. Thank God for this device.
So far this chime works great. I work from home and my office is located in a separate part of the house. This allows me to easily monitor my store for customers if I have run to the main part of the house during work hours. It was very easy to install and comes with several different options for sounds as well as volume.
With this wireless motion doorbell, you be alerted when someone is there.There is not much to do, just place the motion detector where you want it not to be seen. Then place the bell unit into a wall outlet where you can hear it. There are fifty different tones to choose from. Also, there is an antenna on the sensor to give you extended reception up to five hundred feet.Once this is done you have a good alert system.
We use this to let us know if someone has entered the lobby when the receptionist is away for a few  minutes. Virtually no setup, plug it in and it works. Too many melodies to count, we'll even have Christmas music as an alert this winter.
We are using this device in a business to alert us when people approach our front counter area.
Unfortunately, there are only about 3 simple tones and the rest are songs.- The motion sensor uses 9-volt batteries. I HATE 9-volt batteries.- The form and shape of the motion sensor doesn't easily accommodate alternate methods of installation.
Answer: I use mine in an indoor retail setting, and found that it is very sensitive. I have tried to position it so that it only chimes when customers enter through the doorway, but it does pick up motion from just outside the parameters that I would choose. I'm going to try rigging some side walls so that it only "sees" what I want it to.