This is actually an excellent adapter, and the comments found on the listing page are valid - like other users, I had trouble getting an original linkage to the bluetooth headphone's receiver. The trick is in knowing how long to hold the adapter's button to get the pairing mode to kick in. Those other users who couldn't get the adapter to pair up faced the same issues I did, but that's because the accompanying directions are less than adequate. You really have to make sure the blinking light is blinking at a high speed, then the pairing can take place, once I figured that out, the unit has been fantastic, especially at Amazon.Com's price.I spent 30 years in Silicon Valley as a technical writer, and from that perspective, the instructions that accompany the adapter leave a lot to be desired. But the adapter itself works just fine.