The Xvive U4 wireless In-ear monitor receiver only. This mono personal monitor system delivers reliable wireless freedom to every corner of the stage, the high resolution 24-bit/48kbps Audio ensures the clear sound, with ultra-low noise and no artifacts. The system offers plug and play solution, easy to setup and operate. One transmitter can work with many different receivers if they are set to the same channel with the transmitter, which provides the convenience to share the same mix with your band or team.