Peace of mind: With a 45-day money back and 2-year warranty on all Arama headsets, you don't have to worry about the quality of your business headset. Ideal for call centers, home offices, business, teleconferencing, telemarketing. Only available for landline phones with RJ9 headset connector. For other phones, please contact us for compatibility instructions. Built to last: Precision design, quality plastics, durable and advanced. Reinforced headphone cable 6.5 inches, easily provides flexible mobility. Built-in professional microphone mute/volume control for convenience. The new upgraded appearance brings you a different experience. Lightweight and comfortable: Arama landline headsets feature a bendable and rotatable microphone arm that precisely positions the most appropriate call position. Adjustable steel headband fits all head sizes perfectly. Large, soft protein faux leather ear cushions provide all-day comfort. HD Voice for Clear Communication: This RJ9 office phone headset is equipped with a noise-canceling microphone and HD wideband speaker, and combines DSP technology and ASP technology to greatly suppress unwanted background noise and output clear, natural audio, providing a perfect experience. Compatible with Yealink IP phones models: Yealink IP T23G, T27G, T29G, T32G, T33G, T38G, T40G, T42G, T46G, T48G, T49G, T41S, T42S, T46S, T48S, T52S, T53W, T54W, T57W, T55A, T56A, T58A, T42U, T43U, T46U, T48U,T20P, T21P, T22P, T26P, T27P, T28P, T40P, T41P, Grandsteam GXP 1615 1620 1625 1630 2130 2135 2140 2160 2170 3240 3370. Pls Check COMPATIBLE PHONE LIST IN DESCRIPTION.