Citi-fone CD-5 Make Citi-Fone Model CD-5 Description Manufactured by Multi-Elmac Channels 5 Dimensions 8" x 14" x 4-1/2" Citi-Fone CD-5 Technical Specifications AttributeDetails ManufacturerCITI-FONE ModelCD-5 Product CategoryTransceiver Mic Wiring Pin 6 – Mic Audio Pin 7 – RX Pin 9 – Shield / Ground Pin 9 – Switch Line