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**********High quality Noise Canceling Call Center Headset Compatible with following
Polycom phone models: Media Business Phone VVX101, VVX201, VVX300/310, VVX400/410, VVX500, VVX 600, SoundPoint IP 335, 450, 550, 650, 670, Microsoft Lync CX200, CX600. *****This RJ9 headset also Works With other
Telephone Models: Mitel Plantronics Nortel Shoretel Aastra Avaya Lucent Allworx AltiGen Comdial Digium Gigaset InterTel MiVoice etc. SEE MORE COMPATIBLE PHONE LIST IN DESCRIPTION. *****HD Voice for
Clear Communication: Wideband Sound telephone headset enables natural listening experience, noise canceling microphone provides greater focus and concentration by blocking background noise, features large volume control and mute button, provides extra convenience while conversations. *****Noise-Canceling microphone| Flexible, Rotatable microphone boom, user may place the speaker on left or right ear anytime | Soft, leatherette ear cushion for all-day comfort | Click-Stop adjustable headband. | Durable,