Pc Computer Stereo Headset Dual 3.5mm to Cisco Phone Rj9/Rj10 Phone Jack Adapter Converter for Cisco Ip Phone 7940 7941 7960 7961 7945 and More PC Stereo Headset Dual 3.5mm to RJ Plug for Cisco Phones. Please see compatible phone model for cisco brand only in description Still get great quality stereo sound from headset via this adapter All functions on headset and phone would function same Please see compatible Cisco phone models list in description below