Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Sony MDR-RF970RK Wireless Headphones

These headphones were really a disappointment. I had a set of Recoton wireless phones that I had purchased from Sharper Image about 15 years ago. The foam wore out so it was time for a replacement. The overall workmanship and quality of the Sony unit out of the box was noticeably "cheap" but what was even more disappointing was the poor sound quality - gutless sound with poor high and low end. The conduction charging is a nice feature, but doesn't make up for the poor audio. The 15 year old Recoton sounded head and shoulders better. I am returning these.