Monaural Call Center Headset for Cisco Unified IP Phones High quality Corded Call Center headset with Noise cancelation, Acoustic Shock Protection and RF-Shield. Come with RJ9 (RJ22) Quick Disconnect Cord Directly plug into telephone headset jack, no need amplifier. Lightweight, Over-the-Head style, Soft Leatherette Ear Cushion. Compatible wit Cisco Unified IP phone models: 6921, 6941, 6945, 6961 7811, 7821, 7841, 7861 7931G, 7942G, 7945G, 7962G, 7965G, 7975G 8811, 8841, 8851, 8861 8941, 8945, 8961 9951, 9971 Panasonic SIP phone: KX-UTG200 KX-UTG300. Avaya / Lucent Callmaster V and VI Come with RJ9 (RJ22) Quick Disconnect Cord Directly plug into telephone headset jack, no need amplifer Clear sound, durable, 5ft cord, Lightweight, Over-the-Head style, Soft Leatherette Ear Cushion. Rotatable, Flexible Long-lasting metal microphone boom, Adjustable head-band. Rotatable, Flexible Long-lasting metal microphone boom, Adjustable head-band. 2 Years Manufacture Warranty Included!