This is the Futaba 2.4GHz R2001SB SFHSS S.BUS HV Receiver.              The smallest, lightest full-range Futaba receiver ever, weighing in at       4.2 grams, but is also an S.Bus powerhouse guaranteed to take your FPV flights  to the max. Link it with one of four Futaba S-FHSS radios with multicopter           function for unparalleled reliability, programming and innovation.                                                                                        FEATURES: Includes an output on channel 3 for conventional systems                        S.BUS can be used with up to 8 channel transmitter                              Compatible with conventional system servos in addition to S.BUS                   type servos and gyros                                                         Dual antenna diversity                                                          Battery Fail Safe, voltage is set for 4-cell NiCd/NiMH battery,                   fail safe function will not work properly if different type of                  battery is used                                                               LED status indicator                                                            One year limited warranty through Hobby Services beginning at date                of purchase                                                                                                                                         INCLUDES: R2001SB SFHSS S.BUS HV Receiver                                                 Instruction Sheet                                                                                                                                     SPECS:    Applicable Systems: Futaba S-FHSS 2.4GHz system and TM-FH RF Module             Size: 0.83 x 1.65 x 0.21" (21.1 x 41.8 x 5.3mm)                                 Weight: 0.15oz (4.2g)                                                           Power Requirement: 4.8V - 7.4V                                                                                                                        COMMENTS: The SFHSS system that this receiver uses is NOT compatible with                   FASST, FASStest, or T-FHSS systems