JBL CSPM4

JBL Commercial CSPM-4 Paging Microphone is a dynamic close-talking microphone for paging systems in bars/pubs, theatre lobbies, department stores, and much more. A single cable attached to the CSPM-4 contains 3 conductors for audio (Positive, Negative, Shield) and 5 conductors for contact closure (Zone 1, Zone 2, Zone 3, Zone 4, Ground). Selecting a zone and pressing and holding the PTT button will route the microphone audio to that zone.