High-Definition Sound Quality : These headphones’ laser-tuned drivers and a built-in equaliser provide rich, digital audio for full immersion in music, games and calls Noise-Cancelling Mic : Minimises unwanted background noise for clear conversations. The right-sided mic can be conveniently positioned for better voice capture. The discreet boom can be tucked inside the headband and out of the way when you’re not using it On-Ear Controls : Adjust the headphone volume or mute your calls with simple on-ear controls located on the right ear cup. The easy-to-see light indicator on the headset cord confirms mute status Padded Comfort : The headphone H540 features an ultra-comfortable and adjustable design. Soft, padded leatherette headband and ear cups feel good even after hours of listening USB Connection : This plug-and-play headset can be used with any PC or Mac computer without any software. Simply plug the USB connector into your computer and instantly enjoy conversations, movies or music in rich stereo sound