The OEM Plantronics DA80 USB Audio Processor enhances your audio experience with advanced technology that activates screen-locking for security compliance. Its at-your-fingertips interface allows users to maintain focus on callers, while the quick disconnect (QD) feature provides convenient walkaway capability. Enhanced noise-canceling and echo management ensure clear, crisp audio quality. This device is designed for use with all Plantronics QD-equipped headsets (sold separately).