... the clicking sound - but as a product they're pretty good. If you're working on clicker training
937629
These didn't work out for me - my dog is a total wuss and is afraid of the clicking sound - but as a product they're pretty good. If you're working on clicker training, these will likely work for you. They fit nicely in your hand and don't feel like they're going to fall apart.
498049
Nice clickers with whole training philosophy and 16 page ebook on line to instruct use.  The snack bag supports this method of building positive reinforcement  with clickers not just using as distraction.  Really up to user to make it work but this seller gives you the entire package to make it work.  I tried noise in the past but didn't realize the noise is positive with dog if used with treats or hugs.  It's a method worth trying.  Clickers are a significant part but only a part of the method.
2004746
I've had these headphones for 3 months.  The noise cancelling is good and the bluetooth connectivity works very well with my Samsung Galaxy S5.  I really like that you can seamlessly connect multiple devices to these headphones.

However, in the last week these headphones have developed an annoying click that is driving me crazy.  I've tested plugged headphone, streaming thru the car bluetooth, and an external bluetooth speaker - none of these devices click so it certainly appears to be the headphones.  I'll update this review after feedback from Plantronics.
1402135
Sound was good, features very good. These weren't very useful to me because of a loud clicking sound as you walked wearing them. It seems like a defect present in some units, as the noise is very obvious and I was surprised to have this problem after reading other reviews of this headset.
2843794
it's smooth, accurate
only a bit in-perfect is the click sound is a bit loud, which does not claim to be quite so fine
260676
Good sounding, affordable, the clicker is annoying and easily clicks the middle when you mean to change volume, and vice versa. Overall five stars since I don't particularly care about the clicker. You may feel differently.
3083167
Time for a post-purchase review on this thing.

The way the buttons are spread out, clicking the bottom right button is a bit uncomfortable, so I have to go out of my way to click it. The size of the mouse itself is a bit smaller than I'd have hoped for as well. Compared to other mice, this one also seems to attract more dust than the average, and cleaning the bottom of it seems to be a pain since the glue from the rubber soles seem to stick the dust into clumps along the edges of the soles.

Aside from attracting dust along the edges, the rubber soles seem to be wearing out fairly quickly, despite me putting little pressure when I'm actually using it, and the area on the cord closest to the mouse seems to be wearing out as well. I am currently using a Steelseries 9HD mousepad.

On the backside of the mouse, just below of the SteelSeries logo, the paint also seems to be chipping along the edges. I don't really understand how this is happening, as this is the part of the mouse I am in least contact with.

Overall, I think this mouse is amazing performance-wise, and is amazing short-term, but in the long run, it isn't as durable as you would hope from a mouse of such a price.
2832573
Life span on heavy clickers is about 9 months.  Not bad for the price though.
4630373
I don't have a dog, but I have found a use for this great little clicker.

 I'm producing some instructional videos at the moment and it is a one-man show. I am producer, director, writer, cameraman, performer - everything.

 I needed a way to distinguish the beginning points of scenes on the video.

 Normally, in a professional production environment, a clapboard would be used. You know, one of those things with the name of the director and stuff written on it and a hinged wooden clapper at the top. In a one-person production environment, that is more trouble than it is worth.

 So I use the StarMark Clicker Dog Training System.

 It produces a loud, distinct double-click that is clearly distinguishable on the video soundtrack.

 Great little gadget: inexpensive and creates a loud, distinctive pair of clicks. Well made and seems durable.
Jerry
2292629
If you understand frequencies and the dB scale, look at the breakdown of noise reduction levels over the frequency spectrum and see how these things work, it's nifty.

If you aren't looking to deduce how these things get their job done, you can have faith that they will work. Its an odd feeling at first, being able to wear them around in open mode (stoppers out) and have most sounds be only slightly reduced, but then a sudden door slam or shout doesn't hit you as hard as it should. Fiddle with them when you're putting them in for the first time for a good while until you hear a noise reduction, but not a sealed off/muffly type of reduction -- that means they're in wrong and have sealed themselves.

4/5 stars because the stoppers can swivel around and get in the way when you're putting them in. They should be removable.
3290364
They are addi product. How can they not be great. I love my clicks.
3800354
They seem to work OK. Too bad the instructions are pretty much unintelligible at key points. The trick for getting sound from your computer (and I assume any source wired to the emitter, i.e., every use other than as a radio) seems to be to hit the Reset button once.
3988601
For the most part I really like these. They sound good-enough, cancel plenty of noise, have really good battery life, and can be configured to fit comfortably. I mostly use these for mowing the lawn, snowblowing or vacuuming- usually listening to the radio but sometime to my phone either via the headphone jack or Bluetooth and it works great for these. It's been more than durable-enough so far and gets good radio signal.

It's not quite a 5 star product because of its interfaces. It's not a particularly easy-to-use product. Even having done so many times i still have to pull out the instruction manual when I want to change the input device. Once you have it doing exactly what you want it to do it's an amazing product, but getting it to do what you want can be a bit of a pain.
3760231
Definitely a beautiful mouse and seems to work pretty so far, but the click noise on it is just unacceptably loud. Meaning you can't really use it with anyone in the room that's sensitive to noise or is sleeping. It's also a bit hard to click, however - this is something logitech can easily solve with a software upgrade by giving us the option to TAP to click. Since this thing basically has a touch pad on it, if they gave us the option to tap instead of clicking down, it would make this mouse a lot more elegant.
3364123
Pretty decent product with a pretty good range.  It's important to note however that one the 'features' is that the mouse will turn off after a few short minutes of inactivity requiring you to click the mouse before you can use it again.  There is no way to set this to a couple hours (which makes way more sense than minutes) so you end up jiggling the mouse annoyingly and then clicking it constantly just to use.  It's so annoying that the mouse will turn off on a short 8 minute YouTube video.  Buy a mouse where this feature can be set by the user.
1766138
Note: I was requested to review this product and given this product free or at a reduced price to review / evaluate.  The review given is my opinion based on my experience with the product.

First- This is a basic training aid to be used in conjunction with more hands-on repetitive training.  You cannot and should not expect to blow the whistle and tell your dog to do something and magically it will happen.  The whistle is more of an attention getting tool to allow you to help redirect your dog into doing what you want them to do.  However, if you don't continue to work with your dog it will just be a noise maker.

Second- This whistle is noted to be adjustable for different frequencies to help you find what your dog reacts or responds best to.  However, I found that the adjustment wheel was too easily loosened and did not stay in the position I had chosen.  I did however notice that the pitch did make a difference with my dogs.  They were more responsive to certain pitches over others.

Third- It was very useful at night when I would call my dogs back in after their potty breaks.  It was nicer to blow the whistle in two quick secessions rather than yell for them.  I used the whistle several times during the day and called them by name in the usual way then after the second night I was able to just use the whistle and not use their names.  Even though I live in the forest, I know what few neighbors I do have probably like that Im not yelling for my dogs in the middle of the night.

Conclusion:  My dogs seemed to respond to the audible stimulation and when placed with a command it worked well together to teach them the desired response.  The adjustment wheel needs some tweaking or maybe I just got a really loose one, but had to keep resetting it back to the preferred setting.  But because of the positive responses I got from the use with my dogs I cant count this one out and have to say it is worth a try.
1235921
It is good for clicking, double clicking, right clicking, scrolling and has a plug. It doesn't have any bells or whistles, but it does click well.