Office Desk IP Phone Headset RJ9 Compatible with Avaya 1416 1608 2410 5621 9504 9608G 9611G Cisco 7821 7911 7941 7942 7945 7962 8845 8851 Volume Control Adjustable Mic Noise Cancelling | for Avaya 2410 5621 9504 9608G 9611G, Cisco 7911 7941 7942 7945 7962 8845 8851, Volume Control, Noise Cancelling

Compatible with IP telephone models: Replacement for Aastra: 53i, 55i, 57i, 57iCT, 390, 470, 480, 480e, 480i, 2465, 2564, 6737i, 6753i, 6755i, 6757i, 8004, 8009, 8314, 8324, 9009, 9112i, 9133i, 9143i, 9316cw, 9417cw, 9480iM4000, M4020, M5208, M5209, M5216, M5317, M7900, M8001, M8003, M9009, M9516 Replacement for Alcatel-Lucent: 4004, 4010, 4018, 4019, 4020, 4022, 4035, 4037, Temporis 380, IP200, IP800 Replacement for Ascom: Berkshire 200, 400, 600, 800, SD30, MR30, MR51, MR61 Replacement for AT&T: CL2940, CL2940BK Replacement for ATCOM: AT800, AT810, AT820, AT840, R1, R2, R3, R4 Replacement for Avaya, Lucent: 1220, 1230, 1408, 1416, 1608, 1608i, 1616, 2400, 2410, 2420, 4406D+, 4412D+, 4424D+, 4424LD+, 4610, 4620, 4621, 4622, 4624, 4625, 4626, 4630, 5410, 5420, 5601, 5602, 5610, 5620, 5621, 5625, 6210, 6211, 6218, 6219, 6220, 6221, 6402, 6402D, 6408, 6408+, 6408D+, 6410D+M, 6414, 6416, 6416D+M, 6424, 6424D+M, 8101, 8102, 8110, 8400, 8403, 8405, 8406, 8410, 8410D, 8434DX, 8503, 8510, 8520, 8528T, 9404, 9406, 9408, 9410, 9504, 9508, 9608, 9608G, 9611G, 9620, 9620L, 9621G, 9630, 9630G, 9640, 9640G, 9641G, 9650, 9650C, DT1, DT3, DT5, J139, J169, J179 Replacement for BT Converse 220, 225, 300, 320, 325, 420, 425, 1100, 1200, 1210, 1220, 1230, 1300, 1400, 2025, 2100, 2300, 2465, 2564 Replacement for BT Paragon 450, 650, i2002, i2004 (not for i2400 phase II, i2004 POE phones) NT8B20, NT8B30, NT8B40, NT8B50, NTZK23AA, AB (M2216), ACDI Replacement for Cable & Wireless: CWB 100H, 200H, 500, 600 Replacement for Cisco (CIS): 6000 series, 6821, 6841, 6851, 6911, 6921, 6941, 6945, 6961, 7800 series, 7821, 7841, 7861, 7902, 7905, 7905G, 7906, 7906G, 7910, 7910+SW, 7911, 7912, 7931, 7931G, 7940, 7940G, 7941, 7941G, 7942, 7942G, 7945, 7945G, 7960, 7960G, 7961, 7961G, 7962, 7962G, 7965, 7965G, 7970, 7970G, 7971, 7971G, 7972, 7975, 7975G, 7985G, 8000 series, 8811, 8841, 8845, 8851, 8861, 8865, 8941, 8945, 8961, 9900, 9951, 9971

• Comes with a in-line 2 modes (3 wire sequence for each mode) switch, compatible with most landline, VOIP and SIP phones with RJ9 4-pin modular connectors, good for using in business office customer service, conference calls, phone sales, call center, telephone counseling services, insurance, hospitals, banks, telecom operators, enterprises, etc.
• Single-ear hands-free design, Bendable and 330° rotatable noise-cancelling microphone arm can be adjusted to any talking position, In-line mic mute switch and volume control knob, Soft leatherette ear cushion comfortable for all-day wearing, HD speaker with crystal clear sound quality reception
• Easy to use, plug-and-play, if you cannot hear or be heard, please set the mode on the switch block, try each of the line sequence "Channels" until you get clear sound from the headset
• Compatible Landline Telephone Models: Replacement for Aastra 6731i; Replacement for AT&T CL2940 CL2940BK; Replacement for Avaya 1408, 1416, 1608, 1616, 2410, 4610, 5410, 5621, 6408D+, 9504, 9508, 9608, 9608G, 9611G, 9620L, 9641G, 9650C; Replacement for Cisco (CIS) 6000 series, 6841, 7800 series, 7821, 7841, 7911, 7940, 7941, 7942, 7945, 7962, 7965, 7965G, 7975, 8841, 8845, 8851, 8861, 8865, 8945
• Compatible Landline Telephone Models: Replacement for Clarity E814cc; Replacement for ESI 40sbp; Replacement for Digium D62; Replacement for Grandstream GXP1625, GXP1630; Replacement for Intecom ITE 12SD; Replacement for Inter-Tel 8520; Replacement for NEC Aspire, Dterm, DT300 series, ILV series, etc.