Lightweight Comfortable Durable headset. Strong plastic mic boom 330° rotation enable you to find perfect position what you want. If you are not sure compatibility, please contact us ( to Click to the seller iAmoy on the product page) for one to one service. Perfect sound quality, HD voice audio sound and noise cancelling microphone to reduce background noise for clear communication. Acoustic shock protection to protect your hearing, keep the sound level in the safe range. Offer TWO years warranty. Quick Disconnect to RJ9 Cisco cable U10 adapter.An extra 3.5 mm headphone jack cable. One more spare ear cushion in package. Enhanced noise cancelling technology for business telemarketing office call center professional users. Compatible with Cisco IP Phone models: 6941 6945 6961 7821 7841 7861 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 8865 8941 8945 8961 9951 9971 Also compatible with Plantronics M22 M12 MX10 M10 amplifier. Ergonomic and professional headset wide band audio with noise cancellation microphone. Quality comfortable adjustable headband to fit your head size. safety hearing protection technology for long time working. It is your ideal hands free office phone headset for Cisco phones.