Shure PGX24/BETA58 Handheld Wireless System, H6 Receiver Automatic Transmitter Setup Automatic Frequency Selection90 selectable frequencies across 18MHz bandwidth1/4 wave antennas Microprocessor-controlled diversity Channel display LEDXLR and 1/4" outputs Transmitter Automatic Transmitter Setup Multifunction LED indicator (power, lockout, mute, low battery)- 10dB pad8 hours of continuous use with 2 AA batteries18MHz operating range