Logitech H540 Headset USB (Universal Serial Bus) Laser-tuned Speakers with On-ear Controls Ref 981-000480.- Soft leatherette padded headband & earcups.- On-Ear Controls: volume & bass level control, as well as microphone muting (with mute indicator light).- Laser-tuned audio drivers.- USB (Universal Serial Bus) plug-&-play connection.- Adjustable microphone reduces background noises.- Built-in equalizer.