FH5 RF mode is higher resolution than former FH4 RF mode. Also, MT-R installed SUR (SANWA ULTRA RESPONSE) Mode which is faster mode than SSR (SANWA SUPER RESPONSE) mode which was installed in MT-S. Combination with FH5 RF mode and SUR mode will give great smooth feeling. Compatible receivers are RX-491, RX492, RX-492i RX-493, and RX-493i. (FH3 and FH4 compatible receivers as RX-38*, 45*,...