Im very pleased, and will end up using this thing for a loooong time. Leuten im Büro, die Kopfhörer von Sony, Bose und Teufel nutzen, waren vom Klang echt überwältigt. As 2 are used to bolt the tie down hook. The noise cancelling on these are brilliant, just using it without playing anything is good when you want to focus. I purchased these as a second pair, as I have owned a navy pair for a couple of years and they are so so comfortable and great for the beach as you dont need to worry about them getting wet. 800 volts. Im very happy with my purchase. The headphones are very comfortable and the lightweight materials and soft finishes definitely contribute to this! You can see the reaction of cars on my street when they see the light, they slow down. Bought these for my granddaughter.