This headset is compatible with SHURE Body Pack Transmitter Models: L1, LX1, SC1, U1, UC1, UT1, T1, ULX1, UR1, PGX, KCX, FP, BLX, SLX, GLX, GLX-D, ULX, QLX, QLX-D, ULXD and UHF-R. It is designed for Use on Stage, Houses of Worship, Lecturers and Other Applications Requiring Minimum Microphone Visibility with hand-free Operation.