Compatible with Avaya 9608, 9610, 9611G, 9620, 9620L, 9620C, 9621G, 9630, 9630G, 9640, 9640G, 9641G, 9650, and 9650C IP phones. Compatible with PLANTRONICS HEADSETS ONLY! Generic, NOT OEM. Works with H-series Plantronics headsets: H141, H141N, H251, H251N, H51, H51N, H61, H61N, H261, HW261, HW261N, H261N, H51N, HW251, HW251N, H41, H41N, H81, H81N, H101, H101N, HW510, HW520, HW530, HW540, HW710, HW720, H91, H91N, H361,H361N, H351N, H171, H171N, HW301N.
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