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The Astatic AST-878DM 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 it's performance,
just like you would expect from the Astatic brand.