Indoor/Outdoor and Silent
932973
Purchased 2 of these since the description states "indoor/outdoor" and silent!!! We have had them for about a week now and love them! It is a bit larger than we were expecting: If I recall, the descriptions states 10", but actually the dial portion is 10" and the entire clock is closer to 12" in diameter. It is a little plain looking, but just happy that we do not have to continue listening to the "tic, tic, tic". Price is right too... might have to get another one for the garage. (I will get back to you if it stops keeping correct time.)
2779602
No loud and obnoxious ticking, but it does make a steady motor turning kind of noise.  OK in a room with normal a background sound level, but it would be annoying if it was quiet.  I wouldn't want it in a bedroom, for example.  So, definitely not loud, but not silent either.  For what I needed it for it is fine, but the "silent" description is not accurate.
2699663
We have it placed on the ceiling of the kitchen which allows it to alarm at the slightest whiff of browning toast or a hot frying pan.  However, It is relatively easy to quiet.  It would be nice if the sensitivity was adjustable.  It's been in use about three months.
827571
Good air conditioner. I wish it could be a little more quiet, but it is a window unit after all. There is a noticeable reduction in sound when you turn on the "Quiet" mode.
4636248
Sometimes talks without being spoken to, I think it may pick up outside transmissions (because there is usually silence in the home at the time of occurrence). Other than that, I would highly recommend.
1120724
Quiet but FEEBLE - 3feet away cannot feel any wind motion/cooling - product description "Designed for living room and bedroom use..." - NOPE
903899
Works as intended, very little noise on a level surface.
3727385
Easy to install. Open package, insert batteries and secure the motion detector half to the wall.  Remember to turn the detector on when you install the 9V battery (there is a little switch on the board), it took me a few minutes to figure this out as it is not part of the instructions.  There are 2 volume settings, low and high.  Either setting is rather loud and it would have been nice to be able to change the tune that it plays. I tried this in various angles, heights and locations(outdoors/indoors with low lighting/indoors with high lighting). I even tried varying the distances between the two units but had a hard time getting it to work consistently.  Sometimes it would go off and no one would be around and others it would not sound when someone walked by it.

I received this product free in exchange for my honest and unbiased review. All opinions are my own.
3213646
It works fine but it makes too much noise...like it has a motor inside or something. Its annoying and one would only want to put it somewhere outside.
423323
it is hard to hear the HB unless u are in a very quiet environment
2898464
This was a present for my wife and she loves it. We have it set up inside our house and it is not very noisy
3453988
Wonderful answer to a silly problem!
I have an inhome daycare so I wanted a separate bell that we could use when we are outside, and I can't hear the Parent knock. I have it on my door and the chimes transmitter is plugged in outside. The kids LOVE it. They know it is for them, so we all run in to see who is picked up.
I like that I can change it to something fun, and soft so it doesn't startle the little ones.
3415643
the device makes a great sound, however it will not be heard unless there is very little noise around.  it's cool if your just playing around at home..
2300623
I love the silent feature.  I'm often awake later than my husband, and with my old mouse, the clicking would keep him awake.  The other night he made the comment that it's really weird not hearing the mouse click now.  Very easy to set up, I do have to charge it every night, but that's because I use it a lot through the day.  The lights give a nice touch, too.
2712020
There are very quiet.  build quality could stand to be a bit better.
2599837
all is good except while it states is for indoor/outdoor the controller looks like indoor only. Also if used outdoors this product does not look like it is going to last. Time will tell and I will update the review in the upcoming months
2646862
They work, but they are loud.  If I sit in silence I can hear it from 20 feet away.  I knew that could be an issue after reading the reviews on here,  but they were a cheap solution so I decided to try them.  Too noisy for our living area.