The X8R is in a Smaller package than previous 8 channel receivers but has so much more capability. The new SmartPort supports the new hub-less sensors as well as the older hub analog sensors.The X8R supports 8 standard servo outputs, and you can access all 16 channels by using the Sbus line with Sbus supported servos or use a FrSky S.BUS Decoder for the full 16 channels. Or you can use 2 X8R receivers in combination and the channels will sync 1-8 on the first and 9-16 on the second.The X8 protocol is also backward compatible! In D8 mode it works with the DHT, DJT, DFT and DHT-U transmitter modules.