Model K is a dynamic microphone with a modified omni-directional pattern and is especially designed for areas with excessive background noise or where the ambient sound level is high. The modified pattern is one in which the pick-up is more from the front of the microphone than from the sides or back. Normal pick-up pattern is approximately 12' from the front of the microphone and less than 12' from the sides and back of microphone. Model K microphone is compatible with all Louroe base stations. Produces line level output. NOTE: Model K microphone is not recommended where extreme sensitivity is required, such as sleep disorder monitoring, speech therapy labs, etc.