This D8R-II Plus is a slight change from the older D8R-II. It allows the user to select an internal or external voltage sensor. The D8R-II did not have an internal voltage sensor. The internal voltage sensor is a nice feature for our glider and gas pilots, and the external sensor is great for our electric pilots.;Very similar to the D8R-XP except without CPPM and RSSI. However, with a FREE firmware upgrade (upon request) it will also do CPPM + RSSI, as it is identical hardware to the D8R-XP;Compatible with FrSky two way telemetry modules: DFT, DJT, DHT, DHT-U

• FrSky D8R-II Plus - 8 Channel Receiver w/ 2-Way Telemetry

FrSky D8R-II Plus - 8 Channel Receiver w/ 2-Way TelemetryDERIC