Product Detail Sturdy metal housing 42MHz bandwidth: 1680 tunable UHF frequencies for interference-free reception Enhanced frequency bank system with up to 32 compatible frequencies Pilot tone squelch for eliminating RF interference when transmitter is turned off Enhanced AF frequency range . The "Sennheiser ew 500-935 G3 Handheld Wireless System, CH G" is best product for you. We recommended Sennheiser ew 500-935 G3 Handheld Wireless System, CH G