Dual-Ear Corded Office Call Center Headset with Noise-Canceling Microphone, 4-Pin RJ9 Quick Disconnect Connector Cord for most Analog and VOIP Desk Phones. Avaya, Nortel, ShorTel, Polycom, Cisco Extremely Comfortable Binaural (dual ear) ear piece design with leatherette cushion Includes 4-Pin RJ9 connector cord that will connect with 98% of all corded phones with a standard RJ9 size headset jack Flexible and Adjustable Noise Cancelling microphone to help your caller hear you and not excessive background noise. Perfect for Call Center environments. Includes everything you need NO additional Cords or Amps required.