Compatible only with the Uni System 8 VoiceTalk DSP and CarTalk DSP base units with the headset pad. Not compatible with CarTalk, TrendTalk and DeskTalk base units. Can be used with the Bury Interface Module. If you have a Bury car-kit other than the VoiceTalk DSP or CarTalk DSP click here to get the Bury Interface Module to be used in conjunction with the Privacy Handset.