XVIVE U3 Transmitter Black - SingleU3 wireless aims to take the complexity and frustration out of traditional wireless microphone systems. Creating a flexible, all in one solution that makes any of your favourite microphones into wireless. This product is a single Transmitter to add to an initial pair of Transmitter and Receiver. 2. 4GHz band, optimal for Microphone wireless Approved for use worldwide Use with XLR dynamic microphones and battery powered condenser microphones Audio