D4R-II vs X4R-SB - What's the Difference?!
The D4R-II and the X4R-SB look physically the same, but they have some similarities and many more differences. At a very high level, the D4R-II is a PPM receiver while the X4R-SB is a SBUS receiver.
One thing I didn't mention is that the X4R-SB has an RSSI output pad that would require soldering... but it does have it. It is pointed out in the manual (link below).
====================================================
You can get one for yourself here:
FrSky D4R-II:
FrSky X4R-SB:
====================================================
D4R-II Manual:
X4R-SB Manual:
One thing I didn't mention is that the X4R-SB has an RSSI output pad that would require soldering... but it does have it. It is pointed out in the manual (link below).
====================================================
You can get one for yourself here:
FrSky D4R-II:
FrSky X4R-SB:
====================================================
D4R-II Manual:
X4R-SB Manual:
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