The ISOMAX Headset Microphone provides superior audio performance and feedback isolation comparable to the highest quality handheld microphones. Available in wireless configurations, the performer is afforded full mobility and unrestricted freedom of movement. The adjustable headband fits around the back of the head like a reverse pair of glasses, and is easily concealed under the hair, without altering hairstyle. It sits cleanly, comfortably and securely in place, maintaining its relative orientation to the mouth in spite of the most vigorous of head movements. The headband telescopes and is able to be bent at almost any point along its telescopes and pivots to the desired position, allowing for custom fitting onto any performer. Phantom power only.