It is easy to install and works well. HOWEVER - of the 38 door chime sound options there is really only one that is a "Regular" door chime (&-11 Style). The rest are very odd for a door chime - Little sayings, Holiday themed, Etc. I kept scrolling through and heard the one regular one and figured I'd cycle through the rest to see if there was something a little better. There are at most 3 that would be considered your normal door chime.

it would be nice if each unit had a different sound so you would know which area movement is coming from.

Works very nicely as a motion sensor alarm. The sensitivity and range are excellent. It can detect a car moving in the street about a hundred feet away. Just plug it in and it works.

The downside of this product is that all of the tones that it makes are terrible. Apparently the designer thought the product should sound ringtones as if it was a phone. Instead of a brief chime, you get long duration music that assumes the listener wants to hear a concert.

Perhaps it's just me, but I prefer not to listen to Beethoven's Fur Elise when motion is detected. Neither do I want to listen to a Happy Birthday jingle if there is a prowler in my driveway at 3:00 a.m.

The same goes for Christmas jingles, children's jingles, and strange noises with people saying something I cannot understand. All of sounds this thing makes are terrible except for the one that I found which is a ding dong chime.

That one sound is exactly the same as my doorbell sound, so I finally turned it off and just use the light.

I was looking for some motion sensors where I could cover multiple zones without spending hundreds of dollars and these work as advertised. I only wish you could add more than 4 sensors to be monitored but never the less, this gave me the basic coverage I was looking for.

I just got these so can't rate battery life I needed something simple and portable, didn't want to rely on WiFi or Bluetooth. I don't need a picture, just need to get an alert when someone is on the move.

Installation couldn't be easier. I'm just setting my sensors on tabletops so that I can move them as needed, they can even go on the road when needed. I saw one review with a video showing floppy ball joints, mine are not like that and easily hold position. They are very easy to position as a stand for tabletop use. The sensors are sufficiently sensitive and position is not especially critical, it didn't take any fine tuning to make them work.

I can be a little critical of the receiver controls and functions, but not enough to ding stars in the ratings. The mute works great, which is necessary. Volume is a little sketchy, loud, sort of loud and tolerable. I wish the low volume was much lower.

My biggest complaint is the 38 "chime" options. One might think that with 38 options at least one would be some kind of soft wind chime sound, or other soothing chime. In my opinion, every sound is loud, harsh and annoying. I found one I can tolerate at the lowest volume. Both volume and sound choice are made by cycling through the options, and it resets when unplugged so if you are moving the receiver from one location to another as I do you have to reset volume and sound choice each time. And it's sort of a noisy process that could easily annoy others. So if I want to move the receiver into my bedroom at night and my husband is already sleeping there is no way to reset without waking him. I can mute it, count the clicks, unmute, and hope I get it right. That's the best solution I can think of.

So, really, it is not perfect, but it is going to do the job I need done and the price is very reasonable and it didn't take me all day to set it up.