Pc Computer Stereo Headset Dual 3.5mm Adaper Converter To Avaya Polycom RJ9/RJ10/RJ12 4P4C Headset/Handset Plug Convert 4P4C RJ9/RJ10 headset/handset plug To Dual 3.5mm Adapters PC Headset All functions on headset and phone will still function same high quality Easy Setup, Plug and Play Premium Quality , 1FT Long Cable Notice : please see compatible phone list in description, NOT compatible with Cisco Phone