Definition: Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
Input: I would not recommend this product. When I plugged it in, it would not stop chirping. The directions said it might chirp "a few times" while powering up, but the thing chirped all day. Also, the 9 volt battery that came with the product did not fit into the battery compartment. The company that I bought it from told me to just throw it away, although I did receive a full refund.
Output:
Negative