FrSKY ACCST technology is proven, approved by many model associations, tested and reviewed as the leading Chinese 2.4Ghz R/C Technology. If you think DSM2 or FASST is the best, think again!
New FrSKY ACCST (Advanced Continuous Channel Shifting Technology) gives you secure radio communicatios in 2.4Ghz band. ACCST 2.4GHz system shifts 80 channels around hundred times per second in the 2.4GHz band. This means that the system is completely resistant to interference in that band.
Features: Advanced Continuous Channel Shifting Technology (ACCST is our advanced tecnology it shifts channel hundred times per second and there is no signal conflicts and interruptions) robust frequency agility. Easy to bind and very fast link-up. Excellent reboot time. True Diversity with two antennas. All channels can be programmed with Failsafe, quickly and easily. Quick and extremely stable in performance. Precise and smooth servo response. Extended range (1.5km-2.5km).
Receiver Specification: Operating voltage: 3.5v~10v Power consumption: 50mA Resolution: 3072 Latency: 18ms (FS) 9ms (HS) Number of channels: 6 Range: 1.5km Dimensions: 42x22x11mm Weight: 7.1g
Included; 1 x 6-channel receiver D6FR
Compatible with FrSky 2 way telemetry modules: DFT, DJY, DHT, DHT-U
The X6R is newer, and requires an X-series transmitter (Taranis or an XJT module). The X6R supports the new Smart Port telemetry bus and several new sensors that use it, whereas the D6FR only supports an external voltage probe (A2). The X6R also supports S.Bus, for single-wire connections to your flight controller or servo bus (e.g. works great with a DJI Naza). The D6FR doesn't even support CPPM, so you will be connecting all channels with separate wires. The X6R weighs about twice as much, because it has a thick molded plastic case. The X6R has PCB antennas, which are specially shaped to increase gain for both tx (telemetry) and rx (RC), whereas the D6FR has a pair of whip antennas. Also, price.