2.5MM QUICK DISCONNECT HEADSET : Comes with Quick Disconnect cord, users can quickly disconnect this 2.5mm telephone headset without taking it off. This headset ONLY fit Cisco SPA Cisco Linksys AT&T Panasonic Vtech Gigaset Polycom Grandstream Uniden landline phones and most cordless DECT Phones with standard 2.5mm Headset Jack. For compatibility list in details, please refer to description below. | COMPATIBLE MODELS: THIS PHONE HEADSET DOES NOT BE USED FOR MOBILE PHONES AND COMPUTERS. ONLY COMPATIBLE WITH SOME SPECIFIC HEADSETS MODELS LISTED IN DESCRIPTION. Some specific models from Cisco SPA 303, 501G, 502G, 504G, 508G, 509G, 525G, 512G, 514G, 525G2, Cisco Linksys SPA921, SPA922, SPA941, SPA942, SPA962,etc. AT&T: TL86003, TL86009, TL86103, TL86109, TL88002, TL88102, CL80109, CL82500, CL82550, CL8230, CL82309, CL82350, SynJ SB67108, SB67138, 1070, etc. | CRYSTAL CLEAR CHAT: Noise cancelling microphone headset not only ensures natural and crystal-clear communication, but reduce background noise for call centers, offices and home phones even in the noisy environment to make you feel having a face to face conversation. | COMFORTABLE & GREAT DURABILITY: Super soft leather ear cushions and durable construction ensure this lightweight 2.5mm headset to withstand the constant demands of all-day use in busy environments and leave you no pain wearing experience. | 2-YEAR WARRANTY: Guarantees your satisfaction with 45 days free replacement or full refund and 24 months warranty. DON’T BUY IT FOR MOBILE PHONES & COMPUTERS. For other phones, pls feel free to contact us for Compatibility Guide or Advice.