Shure ULXD6/O Wireless Boundary Microphone Transmitter, Frequency: J50A (572-608 MHz and 614-616 MHz) | Color: BlackShures ULXD6 O Wireless Boundary Microphone Transmitters low profile design makes it easy to use in meeting and event spaces where wired mics are impractical. Paired with a ULX D or QLX D digital receiver, the ULXD6 creates a system with low latency, long transmission range, and high channel count, delivering exceptional performance in large meeting venues where live sound reinforcement is required. Note: When purchasing separate wireless components,