Obviously 'NC' represents 'noise cancelling', however it might likewise represent 'no contest', since when it concerns pure, undisturbed sound, the AKG K495 NC headphones provide top quality efficiency and active noise control that are 2nd to none.Durable and easy to charge through the USB, these high-grade headphones create an ideal audio world: you get all the sound you desire, and none of the sound you don't. Prevent making use of headphones with the volume turned up for a prolonged amount of time. Doing so can harm your hearing. It is a good idea to keep the volume at a moderate level at all times. For your very own safety, please do not utilize when driving or cycling.