Looking at them I hope to have many, many happy years service out of these 3. The upright poles are flat on one side and have concave areas around each screw hole. The build quality is fantastic and the mic feels solid. A pair Ive had for at least 7 years (maybe 10, cant recall just when I purchased them) finally busted. Bought this for my son to use on nintendo switch & ps4 to talk to his friends. 1) whereas top-notch integrations of ANC with, e. Im just not enough of an audiophile to give an accurate description. First, because all outside noise is blocked out, there is no need to turn up the volume, saving battery and your ears. these ?pair? with virtually any Bluetooth capable device. Looks good, holds heaps of stuff.