The R7014SB receiver features bi-directional communication with a FASSTest Futaba transmitter using the S.BUS2 port. Using the S.BUS2 port an impressive array of telemetry sensors may be utilized. It also includes both standard PWM output ports and S.BUS output ports. The R7014SB can also be switched to the FASST-Multi-ch System.

FASSTest-2.4GHz Bidirectional Communication System
FASST-Multi-ch 2.4GHz
S.BUS2 / S.BUS Port and 12 Channels (+DG1,2) for Conventional System Receiver
Applicable systems: Futaba FASSTest-2.4GHz / FASST-Multi-ch system transmitter
R7014SB Specifications:
FASSTest-2.4GHz system(14CH/12CH mode)
FASST-2.4GHz system (Multi-ch mode)
S.BUS2 and S.BUS port and Linear 12 ch +Digital 2 ch for conventional system
receiver
Dual antenna diversity
Size: 37 x 50.2 x 15.9 mm
Weight: 20.8 g
Power requirement: 3.7 to 7.4V (Voltage range: 3.5 to 8.4V)
Extra Voltage port: 0 - 70V DC

Battery F/S Voltage:
FASSTest: It sets up with a transmitter
FASST: 3.8V  The Battery F/S voltage is set for 4-cell NiCd/NiMH battery.
Battery F/S function does not work properly when other type battery is used.