Noise Detector - 17 x 5 1/2 x 5 inch

I put it in my busy veterinary clinic. The staff is crazy offended but the noise level has come down.

Works well In a noisy classroom.

I really like mine. I am an art teacher. The only reason I did not give it 5 stars is bc I see two "minor" flaws with the product.1.) many reviews are correct in stating that it is too sensitive at one setting and not sensitive enough at another. 50 decibels is the lowest setting. This is about the noise level of a library. 60 decibels is the next setting and 70 the next. I have to keep it set at 70 decibels bc 60 is far too sensitive but at 70 decibels it doesn't seem to be sensitive enough so it still ends up getting pretty noisy in my classroom.2.) the alarm is great (I have not used the voice setting) but if it gets loud enough in the room the volume of the alarm is not loud enough. I have only had that problem once so far though in the month that I have owned it.All in all I am really happy I have this product. It's pretty pricey and cheaply made but works decently. It's honestly helped me a lot so far. Just make sure you have clear rules about it to your students bc they WILL try to set it off on purpose to be silly and play around.

This stop light is exactly what I was looking for. I teach k - 6 and I can adjust the green level to fit each grade. The siren could be a little louder but its still great. My one complaint is that the buttons stick making it difficult to turn on and off. Hoping this does not get worse.

We purchased this for our library. It is perfect for our need! The ability to program the noise level, the counter, and all the other features make this very useful! It is a little costly, but is working well for us.

We bought this for a friend whose elementary school aged children were severely allergic to the word “No” and to tasks such as putting up toys, getting dressed, or going to bed on time – especially if guests were present. The children's “allergic reaction” symptoms included yelling, wailing, and temper tantrums. The Yacker Tracker can be set to go off at levels ranging from complete silence to “television in background” levels. It also counts the number of violations. It also says “Quiet, Please!” in multiple languages if noise levels are exceeded. It worked almost instantly to reduce and eliminate their “allergic reactions.” At first, the children tried to trigger it on purpose. After loosing privileges and rewards if the Yacker Tracker went off, this ended quickly. Highly recommended for this purpose!

This was great when we first installed it in a classroom, it was great, the PreK class loved it and was using it to help keep each other's volume reasonable. As soon as the product was out of the support window, it stopped working. It powers off after five minutes of use. The class is very disappointed.

I am so grateful for this product. This tool is helping our children understand just what an "inside" voice is. I like that you can adjust the settings to fit your needs and it also keeps track of how many times it has been in the red. I like that it plugs in. We do not need any more battery hogs in our home! You may have to experiment with where to place it in the room to get the best results.