Audio-Technica 700 Series 702 Vocal Unipak Frequency-Agile Diversity UHF Wireless System Includes ATW-T702 Dynamic Transmitter/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 systemsall channels compatible Automatic frequency scanning Diversity operation for increased range/reliability LED Channel display plus Antenna, AF Peak indicators