【NOT for Cell phones and Computers】: ONLY COMPATIBLE with M10, M12, M22 & MX10 Amplifiers or some specific CISCO IP phone models: CTS 500 IP 6821, 6841, 6851, 6921, 6941, 6945, 6961, 7811, 7821, 7841, 7861 Cisco IP 7931G, 7940, 7940G, 7941, 7941G, 7942, 7942G, 7945, 7945G Cisco IP 7960, 7960G, 7961, 7961G, 7962, 7962G, 7965, 7965G Cisco IP 7970, 7970G, 7971, 7971G, 7975, 7975G Cisco IP 8811, 8841, 8845, 8851, 8861, 8941, 8945, 8961, 9951, 9971.

CRYSTAL CLEAR CHAT: Wideband Sound RJ9 Telephone Headset with microphone works for Cisco landline phones enables excellent sound quality for natural listening experience, features Noise Canceling Microphone to reduce background noise, Acoustic Shock Protection Circuit to protect your hearing.

MOST COMFORT HEADSET: Super lightweight wired Hands-free RJ9 office Phone Headset works for Cisco Desk Phones with adjustable headband to fit all head sizes, high quality and soft leatherette ear cushion enhance all-day wearing comfort. Professional Mic Mute / Volume Control built in.

ULTRA DURABLE: Precision design, quality plastics, unibody headband construction, superior quality microphone makes this call center phone headset with RJ9 jack sturdier and more durable. Compete with heavy duty Telephone Headphone for Call Center, Office, home, Telemarketing, Business, Phone sales, Insurance, School, Hospitals, Banks, IT Department, Customer Services, Consulting, Conference Calls.

1-YEAR WARRANTY & COMPATIBILITY NOTES: 45 DAYS MONEY BACK GUARANTEE & 1 YEAR WARRANTY. ONLY COMPATIBLE WITH SOME SPECIFIC PHONE MODELS LISTED IN DESCRIPTION (include but not limited). NOT compatible with Cisco SPA phone series. For Other Phones, Pls contact us for Compatibility Guide or Advice.