· 4-pin cH-style connector Replacement headset compatible with Audio Technica bodypack transmitter. See below for compatability models.· This replacement ear-hook headset does compatible with Audio Technica Body-Pack Transmitter Models: ATW-T3201, ATW-T5201, and ATW-T6001S· Ultra-Light Weight, Easy Clip-on Style with cable clip· RoHs and REACH Complied. Without Pb, Hg, Cd, Cr6 , PBB, PBDE.· Designed for Live Sound Reinforcement, Presentations, Houses of Worship, Conferencing and Stage.