Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Do not order this product!

I ordered two of these items, one for my dog and one for my Mother-in-law's dog, and neither product worked at all! Highly recommend you purchase a product from a different company, I returned both of the collars I ordered (still waiting for refund to post).I can say that Amazon seems to have a great refund policy where you are not responsible for the shipping on the return of a defective item.