Wantek Telephone Headset RJ9 Dual with Noise Cancelling Microphone, Quick Disconnect, Corded Call Centre Phone Headsets For Cisco 7940 7942 7960 Office IP Phones Plantronics M10 M12 M22 MX10(Y602QC1)

ONLY WORKS with Plantronics M10, M12, M22 & MX10 Amplifiers or CISCO IP phone models : CTS 500 Cisco IP 6921, 6941, 6945, 6961, 7821, 7841, 7861 Cisco IP 7931G, 7940, 7940G, 7941, 7941G, 7942, 7942G, 7945, 7945G Cisco IP 7960, 7960G, 7961, 7961G, 7962, 7962G, 7965, 7965G Cisco IP 7970, 7970G, 7971, 7971G, 7975, 7975G Cisco IP 8811, 8841, 8845, 8851, 8861, 8941, 8945, 8961, 9951, 9971 ONLY C...