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.Risq original factory two-way receiver. Dual channel dual antenna.With RSSI output, two-way full-duplex transmission can be realized.Compatible with FRSKY X7 X9D X12S remote control.Support PWM normal 8 channel output or SBUS 16 channel output.Compatibility:D8 mode :FrSky Taranis X9D/XJT/DFT/DJT/DHT/ dht-uD16 mode :FrSky Taranis X9D/XJTC/c product specifications:Channel number :8 channels /PWM 16 channels /SBUSSize (mm) : H14.2 W26.6 L46.2 * *Operating voltage: 4-10vWorking current :100ma/5VEffective distance :>1.5KMRSSI output: analog voltage output (3.3v)