I had this and another bag from Wal-Mart on my roof. Somit wird wohl einfach noch ein bisschen Probieren nötig sein, um die Mikrofone optimal zu positionieren. The only negatives are that I hang my backpack on this everyday and the hook that I use is starting to wiggle a little bit after a few months but not a concerning amount. - MATERIALES. These Wireless headphones are Outstanding. However, this works perfectly, and the best part. These are perfect and dont put any pressure on my toes. Im on the edge of 60, bad knees, overweight, bad back. I would not say this is a con or has affected my review because that is something to do with the Apple software sometimes not reading the device, but it is something to keep in mind. Beyond that, the depth of sound is pretty good.