Av-jefes Avl-630-sh4 Earhook Headset Mic for Shure Wireless Microphone System Sweat and Dust-Proof Made Primarily for Indoor and Outdoor professionals Designed for Use on Stage, Houses of Worship, Lecturers and Other Applications Requiring Minimum Microphone Visibility with hand-free Operation Ultra Light Weight, Easy Clip-on Style & Bendable Boom for Comfortable Use Compatible with Shure Body-Pack Transmitter Models: T1, ULX1, UR1, PG1, PGX1, PGXD1, SLX1, BLX1, BLXD1. (Not Compatible with Mipro, Peavey, Beyer wireless microphone system) RoHs and REACH Complied. Without Pb, Hg, Cd, Cr6+, PBB, PBDE.