The Plantronics DA55 60 provides exceptional sound quality & the flexibility to use any Plantronics headset (P or H range) with Vo IP Soft Phones. A USB (Universal Serial Bus) port connection provides universal compatibility & independence from the PC’s soundcard, allowing the PC’s speaker, not the headset, to ring for call notification. Sound quality is digitally enhanced with Sound Guard Plus & Call Clarity technology, while Digital Signal processing (DSP) suppresses the echo sometimes experienced with Vo IP. Persono Pro software further improves a call centre agents experience of Vo IP & enables managers to easily measure & track compliance with European legislation on employee sound exposure. Features Sound Guard Plus & Call Clarity Inline volume & mute controls Compatible with all Plantronics headsets (P/H) USB (Universal Serial Bus) connection provides universal compatibility Sound customisation via ‘equaliser’ & volume Server-storage of agent-settings Supervisor can optionally override agent settings Sound dosage reports