Instruct: Classify Amazon reviews into positive or negative sentiment
Query: disapointment

It does make a high pitched sound but the audible inaudible switch does not work you have to live with it's screech. The sensitivity control seems to be in a 1 to 10 range it seems to work from 1 through 4, or from quite sensitive to moderately sensitive. The best thing I can say for it is that it does not eat D size batteries by the case. The first set has been in it for 4 weeks. Made in China, and it has the Chinese quality sticker on it.Does it work to quiet a dog? It does get the dog's attention and will quiet him most of the time.In trading emails with the importer, they seem to try to be as nice as they can be, while putting many obstacles in the way of making it returnable for replacement.