Poly CA22CD-DC Push-to-Talk AdapterPoly CA22CD DC Push to Talk Adapter The Poly CA22CD DC Push to Talk Adapter is a compact, reliable headset accessory engineered to give you instant Push to Talk control without compromising audio quality. Designed for professional environments like contact centers, field operations, and corporate communications, this TAA compliant adapter simplifies clear, hands free conversations. It integrates seamlessly with Poly headsets and a wide range of