Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Arrived Broken

I was very disappointed with this product. I previously purchased the same item for myself at a local retail store and have enjoyed it immensely. I then purchase the Acoustic Research AW771 900 MHz wireless headphones for a friend this Christmas. They arrived quickly but did not work properly. the base station does not charge the headphones and there is a high pitched whistle that does not go away until the volume is uncomfortable high. The same headphones work just fine on my system. Now it is a challenge to get them replaced.