Today is the day I used 2. Great works. use them in the gym which is great. headphone cable is hidden under his shirt. my mp3 player is on the other side of the room in my bag. great sound. No static or interruptions. Simple and easy to use. I highly recommend. My only complaint is that it is difficult to connect the cable! Then I attached a lanyard difficulties only because that's all I really need. Furthermore, the product works as expected, and as I said is extremely easy. I believe that the great works when you want something like wireless.