Rannsgeer AVL630R-SH4 Mini Headset Microphone is designed especially for Shure Microphone System. Built in with Mini capsule diameter and the ultimate in low profile, high performance vocal pickup Omnidirectional condenser headset microphone. Product Features include Sweat and Dust-Proof Made Primarily for Indoor and Outdoor activities. Can be used for on Stage, Houses of Worship, School Lecturers and Other Applications that Require Minimum Microphone Visibility with hand-free Operation Ultra-Light Weight, Easy Clip-on Style 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.