UHF Dual Channel True Diversity Handheld Wireless Microphone System VERY IMPORTANT - if you wish to run 2 receivers and 4 transmitters together and to avoid interference between the two systems, it is recommended you use the following setup: Unit 1 - set channel A to frequency 1 and set channel B to frequency 14. Unit 2 - set channel A to frequency 5 and set channel B to frequency 15. Features UHF receiver Handheld microphone transmitters 16 UHF frequencies from 863.0 to 865.0 MHz Balanced output sockets (3-pin XLR) Unbalanced 6.3mm jack for mixed audio output Twin adjustable antenna system