They are the model R324SBS and R304SB and are in great shape. Bus2 4-Channel T-FHSS Telemetry Receiver. This is the Futaba R324SBS 2.4GHz TFHSS 4-Channel SBus-2 Receiver. Designed for use with Futaba surface transmitters using TFHSS. Normal/high-speed modes (auto detection), normal mode accepts any. Type of servo, high-speed mode only accepts digital servos. Futaba R324SBS […]