FIG. 1 is a front perspective view of an omnidirectional wireless microphone for use with a multi-user audio system;

FIG. 2 is a back perspective view of an omnidirectional wireless microphone for use with a multi-user audio system;

FIG. 3 is a front view of an omnidirectional wireless microphone for use with a multi-user audio system;

FIG. 4 is a side view of an omnidirectional wireless microphone for use with a multi-user audio system;

FIG. 5 is a back view of an omnidirectional wireless microphone for use with a multi-user audio system;

FIG. 6 is a side view of an omnidirectional wireless microphone for use with a multi-user audio system;

FIG. 7 is a bottom view of an omnidirectional wireless microphone for use with a multi-user audio system; and,

FIG. 8 is a top view of an omnidirectional wireless microphone for use with a multi-user audio system.

The broken lines form no part of the claimed design.