USB Headset for Call Center with Noise Cancelling Microphone for Phone Mac Skype Microsoft Lync with Voice Recognition Mic for Drangon with Volume Controller Mic Mute and Call Button With USB chip of DSP technology for beautiful sound quality and perfect voice transmission, good choice for clear network communicationCrystal Clear Chat – Great flex adjustable and reversible mic arm, high-sensitivity microphone picks-up your voice loud and clearHigh Quality Wideband HD audio sound, perfect for multimedia use and communicationWith voice recognition microphone for speech dictation and language learning Convenient In-Line Controls, volume up and down, microphone mute and hook switch optimized for Microsoft LyncLight weight and Large Luxurious protein leathrette ear cushion to reduce backgroud noise and for completely all day long comfortDurable headband with easy adjustment to fit for different head sizes Rotatable Microphone Arm and Ear Cover for Microphone on Either Side Super Soft and User-friendly Ear Cushion Adjustable Headband for Different Headsizes Active Noise Cancelling Adapter for Microphone with Volume Control and Mic Mute With USB plug for devices with USB port, Windows Mac and other PCs