Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive. The review is as follows: " I read reviews of this product before I bought it that mentioned that it makes a high pitched sound. I figured these reviewers probably had defective adapters. However, mine also makes a high pitched sound. It doesn't do it all the time, but I worry that as it gets older, the sound will get worse. Although it charges my computer fine, if I could do it over again, I might pay the extra money and get a different brand...unless you don't mind high pitched noises." Your entire response should be in English, and in all capital letters.
user