AV-JEFE AVL670 Professional Omnidirectional Earhook Microphone (Tan Color, with Hirose Mini 4 Pin XLR Connector) Super Lightweight! Extremely flexible and easily deformed to fit over the ear of any user. High quality voice/sound pickup. Boom is bendable for mic positioning to get optimum vocal clarity Compatible with Audio-Technica Transmitters: T27, T31, T51, T200, T201, T210, T300, T310, 1100 Series, 1400 Series, 2000 Series, 3000 Series NOT COMPATIBLE WITH: T35, T75, T211, T601, T701, 1000 Series, 1200 Series, 4000 Series, 5000 Series, 7000 Series RoHs and REACH Complied. Without Pb, Hg, Cd, Cr6+, PBB, PBDE. ** Important: For wireless receivers & transmitters of other brands, please contact us to check the compatibility first, even their connectors look identical, since they may have different internal wiring.**