Compatible Phone List (Include but not limited): Cisco IP Phones:7931G, 7940, 7940G, 7941, 7941G, 7942, 7942G, 7945, 7945G, 7960, 7960G, 7961, 7961G, 7962, 7962G, 7965, 7965G, 7970, 7970G, 7971, 7971G, 7975, 7975G, 6921, 6941, 6945, 6961, 7821, 7841, 7861, 8811 8841 8851 8861, 8941, 8945, 8961, 9951, 9971Plantronics Amplifier: M10, M12, M22 & MX10 Vista Modular AdaptersPanasonic: KX-UTG200B, KX-UTG300BIf you can’t find your phone model in lists, pls consult us for compatibility advice. NOTE: Not compatible with Cisco Spa phone series. If necessary, please search Arama 2.5mm headsetNot compatible with some Specific Cisco Phone Models such as: 7902, 7905, 7905G, 7906G, 7910, 7910+SW 7911, 7912 IP Phones. If necessary, please search another Arama RJ headsetFriendly Notes: This headset only works for Cisco landline phones with RJ9 Jack, NOT for Smartphones and computers. (2.5mm plug, 3.5mm plug or USB plug are NOT included in the package). Previous page Next page 1 Crystal HD Sound 2 Noise cancelling Mic 3 Durable &Ergonomic Design 4 In-line Controls Crystal Clear Calls Incorporates optimized wideband audio technology and noise cancelling mic to enable you enjoy a clear internet call freely. Acoustic Shock Protection Circuit to protect your hearing. Free up Your Hands Full days online hands-free talking. Arama call center phone headset with mic allows you to easily call while typing or taking notes. It's a practical and good companion for business, make your work more easier. How long is the cord? The cord is around 195cm(6.4feet), and there is an extension coiling cable, so you can extend the cord to be around 205cm(6.7feet). Does this headset have a mute switch? Yes, this telephone headset has microphone mute switch and in-line volume control.