Samson Concert 99 Presentation Frequency-Agile UHF Wireless System (K: 470-494 MHz) User Manual | Page 83 / 84 | Also for: Concert 99 Handheld Frequency-Agile UHF Wireless System (K: 470-494 MHz), Concert 99 Earset Frequency-Agile UHF Wireless System (K: 470-494 MHz)