Ultra Lightweight Beige Unidirectional Headset Microphone for Shure Wireless Transmitters_Adjustable Left / Right Boom Clear voice pick-up. Designed for speech, lecture, broadcasting, conference. Super lightweight, thin. low profile, flexible & durable frame Mic Boom can be attached on the left or right side of headset frame Compatible with Shure models: UC1, BLX1, FP1, GLXD1, PG1, PGX1, PGXD1, QLXD1, SLX1, ULX1, ULXD1, UR1, UR1M. (NOT Compatible with Telex) Boom Length: 4.5 inches (including 1.5 inch gooseneck tip for easy adjusting mic capsule directions)