Changed Mind
Initally this product did work well, however, as time went on, even though I turned it off each time, the battery would have run down within 1-2 weeks after the last use.  So if I used it, and then didn't need it again for a week or so, and then go to use it, the battery had died.  VERY FRUSTRATING. These are 9-volt batteries, so they are not cheap.  Bottom line, I WOULD NOT recommend this product!!  Sorry.<br /><br />I have three dogs who need to learn not to bark at every little thing they hear in our out of the house.  I only use this as a training aid at those times.  The dogs are usually within 20-40 feet of the device.  At the same time I am using voice commands as well, with praise when they are "quiet".<br /><br />This training aid has been invaluable, and worked quit well.  Just remember to turn off after each use, or the battery will run down.<br /><br />A great product for the money.
Rating: 2 stars