The Avaya Compatible Plantronics VoIP EncorePRO HW720 Duo Headset with Avaya Telephone Interface Cable (with Mute Button) is the latest headset by Plantronics. With added improvements to durability and sound you'll find this new headset to be your work horse for all your office communications. The included Telephone interface cable allows for easy plug-n-play connectivity to your Avaya phone. And also comes with a mute button to provide convienient privacy - no need to reach for the mute button on the Avaya phone. Avaya Compatible Plantronics EncorePRO Headset Bundle is intended for the following Avaya® IP Phones: Avaya 1600 and 9600 IP Phones: 1608, 1616, 9601, 9608, 9610, 9611, 9611G, 9620, 9620C, 9620L, 9621, 9630, 9640, 9640G, 9641, 9650, 9650C, 9670. It's the cost-effective Ultra noise-canceling headset that doesn't compromise on quality. Just plug this headset into the headset jack on your Avaya phone and your are ready for handsfree usage. The Plantronics Encore PRO Avaya compatible headset is the gold standard in performance and comfort. Featuring Plantronics wideband audio capability and a ultra noise-canceling microphone with extended boom for industry-leading background noise reduction and echo performance. What's in the Box â Plantronics Encore PRO HW720 (formerly HW291N) Headset â Plantronics Avaya Telephone Interface cable with Mute Button â BUNDLE OF 2 ITEMS: â Plantronics EncorePRO Headset & Avaya Telephone Interface Cable with Mute Button â BUNDLE OF 2 ITEMS: â Plantronics EncorePRO Headset & Avaya Telephone Interface Cable with Mute Button â BUNDLE OF 2 ITEMS: â Plantronics EncorePRO Headset & Avaya Telephone Interface Cable with Mute Button â QUICK DISCONNECTIVITY: â Allows for easy disconnect from phone without removing headset â COMPATIBILITY: â Compatible Avaya IP Phones: Avaya 1600 and 9600 IP Phones: 1608, 1616, 9601, 9608, 9610, 9611, 9611G, 9620, 9620C, 9620L, 9621, 9630, 9640, 9640G, 9641, 9650, 9650C, 9670 â NOISE CANCELLING: â Ultra Noise-canceling microphone filters out background noise â GLOBAL TECK SERVICE:â Low-cost, affordable, commercial-grade headset.