This is the ideal solution for long range telemetry or communications.  Two RFD900+ modems with antennas for all antenna ports.

The suggestion for a system:

2 x RFD900+ Radio Modems

1 x Antenna, 900MHz Quarter wave monopole 2.1dBi

1 x Antenna, 900MHz Right Angle Quarter wave monopole 2.1dBi

2 x Antennas, 900MHz Half wave dipole 3dBi

1 x USB Upgrade cable

However, you can set your system on your opinion/need as well.  

Please check out our other listings for:

- RFD900 plus to Pixhawk cable: https://www.helibatics.com/pixhawk-to-rfd900-telemetry-cable/

- RFD900u to Pixhawk cable: https://www.helibatics.com/rfd900u-to-pixhawk-cable/

Note: If you select purple USB cable for programming, please check this listing for driver, and wires order (2nd picture) when plug in your modem to computer:  https://www.helibatics.com/multipurpose-usb-upgrade-cable-can-be-used-for-rfdesign-long-range-telemetry-radio/