Audio-Technica 700 Series Unipak&iquest; Frequency-agile Diversity Uhf Wireless Systems Includes AT-GcW Instrument Cable 8 Selectable UHF Channels Auto Frequency Scanning Use up to 8 Systems simultaneously Professional features and sound quality unheard of in its class^Use up to 8 simultaneous systems All channels compatible ^Automatic frequency scanning ^Diversity operation for increased range/reliability LED Channel display plus Antenna, AF Peak indicators