Av-Jefes VH16C-SH4 Ultra Lightweight Headset Microphone for Shure Wireless Microphone Element : Back Electret Condenser with Polar Pattern : Unidirectional Designed for presentation/ speech use requiring minimum microphone visibility with hands-free operation Ultra Light Weight, Bendable Boom for Comfortable Use Dual Sided Miking capabilityBoom can be positioned at left or right side of the headset frame RoHs and REACH Complied. Without Pb, Hg, Cd, Cr6+, PBB, PBDE.