having receiving properties equal in all directions in the horizontal plane.

Applied to microphones with a uniform pickup of sound from all directions.

This type of microphone transmits environmental sounds in addition to the speaker's voice.

Capability of a tag to operate in any orientation.

Refers to the characteristic of some bar code formats to be able to be read regardless of orientation, or to the characteristics of some readers to read a bar code regardless of the bar code's orientation to the reader.

This typically refers to a primarily circular antenna radiation pattern.