Wantek Phone Headset with Microphone Noise Cancelling & Mute Switch, RJ9 Telephone Headsets Compatible with Office Landline Phones 6851 6945 7841 7861 7942 7945 7961 7962 7965 8811 8841 8845

??NOTE: ?? This headset is only a 4-Pin RJ9 Crystal Headset, NOT USB & 2.5mm & 3.5mm Headset(2.5mm plug, 3.5mm plug or USB plug are not included in the package). It only works for some specific CISCO landline phone models, NOT for smartphones and computers directly. If necessary, please purchase Wantek 2.5mm headsets, 3.5mm headsets or USB headsets. Compatible Landline Phone List : KX-UTG200B, KX-UTG300B Compatible with Plantronics : M10, M12, M22 & MX10 Amplifiers Cisco IP Phones: 6821, 6841, 6851, 6921, 6941, 6945, 6961, 7811, 7821, 7841, 7861 7912, 7920, 7931G, 7940, 7940G, 7941, 7941G, 7942, 7942G , 7945 7945G, 7960, 7960G, 7961, 7961G, 7962, 7962G, 7965, 7965G, 7970 7970G, 7971, 7971G, 7975, 7975G, 8811, 8841, 8845, 8851, 8861 8941, 8945, 8961, 8865, 8941, 8945, 8961, 9951, 9971