Works for AVAYA 1608 1616 9608G 9611G 9620 9630 9641G 9650... or CISCO 7902 7905 7906G 7911...7912 or Grandsteam GXP 14xx GXP1400 GXP1405 GXP2140 GXP2160...GXV3240 GXV3275 or Work for YEALINK T19P T21P T22P T28P T41P T32G T38G T42G T46G...T48G SNOM 300...821 Panasonic KXT and MORE DESKPHONES LISTED IN DESCRIPTION. | 【NOT for Cell phones and Computers】. ONLY COMPATIBLE WITH SOME SPECIFIC PHONE MODELS LISTED IN DESCRIPTION. Buy the item today if you have one of phone models in list. For Other Phones, pls Contact Us for Compatibility Guide or Advice. | High Sound Quality for Clear Communication: Wideband Sound corded telephone headset enables natural listening experience, features Noise Canceling Microphone to reduce background noise, Acoustic Shock Protection Circuit to protect your hearing. | Most Comfortable Headset: Super Lightweight Wired office telephone RJ headset binaural with adjustable headband to fit all head sizes, high quality and soft leatherette ear cushion enhance all-day wearing comfort. Quick Disconnect(QD) feature enables you to walk away without removing the headset. | Super Durable: Precision Design, quality plastics, unibody headband construction, superior quality microphone makes this dual call center hands free headset sturdier and more durable. Compete with Plantronics or Jabra heavy duty Headsets for Call Center, Telemarketing & Office.