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 of the CB desk mic can be adjusted with a potentiometer located under the base. The AST878DM is manufacturered to take normal abuse while retaining it's performance, just like you would expect from the Astatic brand.