Plantronics C320-M Blackwire Headset: * Intuitive, in-line controls * Indicator lights and audio alerts * Simple plug-and-play USB connectivity * Lightweight metal headband offers durability and a customizable, comfortable fit * Convenient wearing styles available: hi-fi stereo or monaural design * Wideband delivers heightened speech clarity, providing the best possible PC audio quality * Dynamic EQ feature automatically adjusts audio for voice or multimedia use * Noise-canceling microphone reduces background noise * Enhanced Digital Signal Processing (DSP) provides more natural sounding voice