This kayak rack was very easy to install. These are a perfect size and shape for my oval-shaped head. Loved the portability of the QC 20, but the lower 10 hour battery life is a drawback that bugged me as well. I like shopping at Amazon. Das Aktivieren und Deaktivieren des Mikros per Hoch- und Runterklappen beim HyperX fand ich extrem klasse. My complaint is that the Bluetooth will occasionally randomly shut off, and will take ten or more minutes to fiddling and turning on and off to get it back working again. So sad to have wasted money on these. zu blockieren, halten schön straff mit Magneten am Gehäuse. The noise cancelling is better than Bose and I love the touch cups. I had a pair for I think two years before one of the ear pieces started to come apart, so I immediately ordered a second pair exactly the same but a new color.