This is the Futaba R7003SB FASSTest 2.4GHz Bidirectional
S.BUS2/S.BUS Port and Conventional System Receiver.
Compatible with Futaba FASSTest 2.4GHz transmitters
One year limited warranty through Hobby Services beginning at date
Futaba R7003SB FASSTest 2.4GHz Receiver with EXT-VOL cable and
Dimensions: 0.89 x 1.47 x 0.37" (22.5 x 37.4 x 9.3mm) Weight: 0.25oz (7.2g) Power Requirement: 3.7-7.4V (voltage range, 3.5-8.4V) Extra Voltage Port: (port2) "EXT-VOL cable and CA-RVIN-700" as an option is used: 0 - 70V DC Antenna Length: 5-3/4"