XVIVE U3 Microphone and Speaker Wireless Adaptor 2.4GHZU3 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. 2. 4GHz band, optimal for Microphone wireless Approved for use worldwide Use with XLR dynamic microphones and battery powered condenser microphones Audio signal transmission via XLR, from Signal processor or powered Speaker out to Speaker in Less