Active Noise Cancelling- Active noise Cancelling worked great, used them in a busy college common area and couldn’t hear a thingOverall a great pair of professional noise canceling headphones. Its almost as if they used a small hand in a palm style grip to design the shape. Take 2 hours to charge. I could not get my foot in them because they were not wide enough. Was light enough to roll to our utility room for storage with little effort. Was very pleasantly surprised to see how well these little guys worked for the price! Relatively easy to assemble if youre fine with pictures only. Para bicicletas que no incluyan soporte para silla trasera o porta bultos. They are extremely comfortable headphones, unlike other razer headsets I have had in the past, that give you a headache from wearing it for too long. There are always people talking in my office and there was very noticeable different with and without the noise cancelling turned on.