If you own a set of Skyzone SKY04X / Eachine EV300O FPV goggles, we can guarantee that this additional receiver upgrade will improve your FPV range and reception. As standard those goggles include a single receiver that works like other leading Rx modules, in that it merges two video signals into one image to produce the strongest possible reception and clearest image. It does a great job and is well reviewed, but now you can go even better by adding this additional module. It's easy to install, the SKY04X / EV300O goggles have a second module bay ready to accept the module and with it you will able to add two further antennas to benefit from “quad-versity”! This module is only compatible with the Skyzone SKY04X / Eachine EV300O goggles. On the Eachine branded goggle, the receiver is known as the RapidMix module, but it's the same thing and cross compatible with Skyzone.