I finally felt well enough to open the box and low and behold this is what I found;-There were no instructions included in the box-a piece of plastic was broken on the product (one of the adjusting screws) which made it hard to adjust for bike-I cant seem to get the tension to increase in order to make it actually as though Im working out. Love these brushes. Needles to say, it didnt work with my 7. It is a comfortable shoe, but I didnt like how it looks when you wear it. I usually just leave it plugged in tho so I dont have to worry about it dying. Im not optimistic, lol. Pros:- Good sound quality, both audio output and the microphone- Comes with a dedicated USB transceiver, so it doesnt depend on the computers Bluetooth support- The noise cancellation is quite good. I was satisfied that since none of my test amplifiers (Adcom, Yamaha, Onkyo) showed any sign of distress, a 1 ohm DC load was not a problem. Afortunadamente al sentir la caja con muy poco peso hice un video de unboxing para tener evidencia. You can leave the back of the shoe slightly unzipped at the top of the heel, so you can bend your foot better.