This is the Futaba R7003SB FASSTest 2.4GHz Bidirectional S.BUS2/S.BUS Port and Conventional System Receiver.
Key Features:
Specifications:
Note: If this receiver is not used with an S.BUS2/S.BUS system, only three channels are operational. If used with an S.BUS2/S.BUS system the maximum number of channels of the transmitter can be used.