Best price-value Sanwa receiver on the market, compatible practically with all Sanwa transmitter FHSS2 and above. I use it with MT-4 and Ansmann W3.1 Transmitters without any issues. Due to LRP website it fits MX-V, MX-3x, Exzes-X, MT-4, M11x, M12, and clones of LRP-C3-STX-Pro transmitters, but without Sanwa Super fast Response (SSR), or SSL transfer. If you go for 2-3ms reaction time (cause you're Superman, or Ronald Völker) go for RX-471. In any other cases, you'll be happy with this!