The Bogen model MBS1000A is a dual-impedance, uni-directional, dynamic desktop microphone with a rubberized finish for all industrial and commercial public address and paging applications. The MBS1000A has a bottom mounted slide switch for low or high impedance selection. The wide band frequency response is smooth and peak free, thereby providing a natural, highly intelligible sound. The microphone output provides a normally open switch closure pair that can be used to operate external equipment. When the microphone is activated using either the push-to-talk or lift-to-talk functions, the provided contact closes. The push-to-talk actuator bar includes a locking feature to allow the MIC to remain active for extended periods. The lift-to-talk feature can be enabled or disabled using a bottom mounted selector switch. Four molded, non-skid, non marring, and permanently resilient "feet" are located under the cast base.