Goolsky RadioLink R9DS 2.4G 9CH DSSS & FHSS Receiver for RadioLink AT9 AT10 Transmitter RC Helicopter Multirotor Support S-BUS DSSS & FHSS technique, super anti-interference and stability RX voltage and signal strength telemetry, extensional sensor for EP, Temperature, RPM, GPS etc S.BUS. CH9 is set for S.BUS Section precision 4096, stable the servo, rudder shaking free All 9channel needs 3ms to response parallel