DZK Evolve 40 Stereo headset Professional headset for greater productivity and amazing sound for calls and music State-of-the-art, noise-cancelling microphone eliminates background noise. Specially designed ear cushions filter out high-frequency sounds. You and your conversation partner won't struggle to hear each other. Get easy access to the most used functions, like volume and mute. You can also answer and end calls directly from the control unit. Works out of the box with all leading systems. Installation is as easy as simply plugging it in.