Audix R41 KIT True Diversity Wireless Receiver | Frequency: B (554-586 MHz)The R41 Kit allows a custom system to be configured according to ones unique application. It includes a diversity receiver with antennas, power supply, and padded carrying case. Just add the desired handheld or bodypack transmitter of your choice to the system. Available Frequency Bands A = 522 MHz 554 MHz B = 554 MHz 586 MHz