Audio-Technica 700 Series ATW-701/L UniPak Frequency-agile Diversity UHF Wireless Lavalier Systems Includes Lavalier Microphone 8 Selectable UHF Channels Auto Frequency Scanning Use up to 8 Systems simultaneously Includes Lavalier Microphone 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