It is compatible for all Sennheiser Evolution Wireless frequency bands (A, B, C, D, E, etc.).
Compatible Mode: EW100 EW300 EW500 G1 G2, EM100 EM 300 EM500 G1G2, EM300 G1, EM500 G1, SR300 G1 G2,
Frequency range: 430-870MHz (usable on any frequency band, A 500MHz, B 600MHz, C 700MHz, D 700-800MHz, E 800MHz)