All of this is available in a package just a little larger then the Frsky Receiver D4FR
This Frsky Receiver D4R-II is a full featured mini sized 4 channel receiver by FrSky. What makes this receiver different from the Frsky Receiver D4FR? The Frsky Receiver D4R-II's data port allows you to connect a sensor hub so you can connect GPS, Variometer, temperature, RPM and all of the other great FrSky sensors. It also has 2 full length detachable antennas. All of this is available in a package just a little larger then the Frsky Receiver D4FR.

All of this is available in a package just a little larger then the Frsky Receiver D4FR

This Frsky Receiver D4R-II is a full featured mini sized 4 channel receiver by FrSky. What makes this receiver different from the Frsky Receiver D4FR? The Frsky Receiver D4R-II's data port allows you to connect a sensor hub so you can connect GPS, Variometer, temperature, RPM and all of the other great FrSky sensors. It also has 2 full length detachable antennas. All of this is available in a package just a little larger then the Frsky Receiver D4FR.

Frsky Receiver D4R-II Features:

Firmware upgradeable

full length antennas (replaceable)

One external analog telemetry port and one digital data-stream port (connect to Sensor Hub FSH-01)

RSSI (PWM) and CPPM output - If CH3 and CH4 are connected by a jumper, CH2 will output RSSI (PWM), and CH1 will output CPPM for CH1~CH8

Lighter weight and physically smaller than D8R-II Plus & D6FR

Alarm warning on low voltage, poor reception, etc

Frsky Receiver D4R-II Specifications:

Dimension: 40*22.5*6mm

Weight: 5.8g / 5g (naked)

Operating VoltageRange: 3.5V-10.0V

Operating Current: 60mA

Operating Range: FullRange 

Resolution: 3072 (>11bit)

Frsky Receiver D4R-II Compatibility:  

FrSky two way telemetry modules: DFT, DJT, DHT, DHT-U

What's in the Box:

1 x D4R-II

2 x Short tool

1 x Data wire

1 x Manual