The Logitech PC Headset 850 with its single earphone design allows users hear ambient noise and to hold conversations without removing the headset. Convenient in-line controls for easily adjustable volume and microphone mute. The noise-canceling microphone filters background noise and can be adjusted to the optimal position for clearer conversations. The microphone rotates out of the way when not in use. Set-up is easy and fast; simply plug in the 3.5 mm audio jack. Ships in a business pack ideal for system builders, integrators and value-added resellers.