Quick Disconnect(QD) feature enables you to walk away from the desk without taking headset off. Do not buy the item if you can’t find your phone model in lists, pls consult us for compatibility advice. Compatible Landline Phone List : Cisco IP Phones: 6821, 6841, 6851, 6921, 6941, 6945, 6961, 7811, 7821, 78417861, 7912, 7920, 7931G, 7940, 7940G, 7941, 7941G, 7942, 7942G7945, 7945G, 7960, 7960G, 7961, 7961G, 7962, 7962G, 7965, 7965G7970, 7970G, 7971, 7971G, 7975, 7975G, 8811, 8841, 88458851, 8861, 8941, 8945, 8961, 8865, 8961, 9951, 9971 Plantronics: M10, M12, M22 & MX10 Amplifiers Panasonic: KX-UTG200B, KX-UTG300B NOTICE: Not compatible with Cisco Spa phone series. Not compatible with Cisco 7902, 7905, 7905G, 7906, 7906G, 7910, 7910+SW, 7911, 7911G, 7912 IP Phones. Friendly Notes: This headset ONLY works for some Cisco IP Phones with 4-Pin RJ9 Jack, NOT for Smartphones and computers. If necessary, please purchase Wantek 2.5mm headsets, 3.5mm headsets or USB headsets. Free up Your Hands Full days online hands-free talking. Wantek call center phone headset with quick disconnect cord allows you to easily call while typing or taking notes. It's a practical and good companion for business, make your work more easier. Quick Disconnect (QD) Feature Quick Disconnect (QD) feature provides walkaway convenience, enabling users quickly leave desk without taking headset off and keeping call still remains. Ideal for Call Center, Business, Office, Home, etc. Convenient In-line Controls Professional Volume Control and Mute Switch built in. Easily adjust the headset volume up/down, mute/unmute the microphone. Easy to use, just plug the headset into the RJ9 Headset Port on your phone and you’re ready to talk. Super Lightweight Weighs only 57g/2oz. Super lightweight 4-Pin RJ9 telephone headset brings no burden to your head and ear, helps you focus on your calls and enables all day wearing comfort. 330° Rotatable Microphone 330°rotatable microphone can be worn on either the left or right side. Single-Sided office phone headset is ideal for users who prefer to leave one ear open to hear their environment. Adjustable Headband Designed with flexible and adjustable headband, you can easily adjust and bend it to fit all head sizes to reduce the pressure from the headset. It helps you achieve the optimal wearing way. Comfortable Ear Cushion The over-ear ear cushion is made of protein foam, very soft and breathable, which can reduce much pressure bringing to ears and helps you focus on your calls.