Astatic AST-878DM The Astatic AST878DM is an Omni Directional Ceramic Desk Microphone offering a rugged cycolac housing for industrial and commercial applications. The Microphone switching is accomplished with a simple PTT button with locking capabilities. The volume can be adjusted with a potentiometer located under the microphone base. The AST878DM is manufacturered to take normal abuse while retaining its performance, just like you would expect from the Astatic brand. APPLICATIONS: Fire,Police and Taxi Dispatching, Paging in Department Stores, Bowling Alleys, Factories, Schools, Fast Food Restaurants, CB Desk Microphone SPECIFICATIONS: - Standard PTT Push-to-talk and Lock-To-Talk buttons - High quality omnidirectional ceramic cartridge - Five conductor shielded, strandard astatic color coded cable with 4-Pin Connector (standard Cobra/Galaxy/Uniden wiring). - Requires 9 Volt Battery (not included) WIRING OF MIC CABLE: Pin 1 = Shield Blue; Ground Common Pin 2 = White; Audio Pin 3 = Red; PTT TX Pin 4 = Black; RX
