Check out our recent review where we compared the two popular long range systems, the Crossfire and the Frsky R9M. Take a look at the rest of the settings and change whatever you need, the most important thing is to make sure you are using the correct frequency for your region — US should be using MHz while Europe should be using MHz. Then power up the system, let your operating system boot, and install the latest drivers for the graphics cards. Same capability as the Micro RX, but a lot smaller! The second header on the cards is for a third and fourth card in the system. To install another graphics card, you will need to fully shut down the entire system again.
To maximize range and signal strength, try to avoid getting the antenna blocked by the frame.
How to hook up crossfire graphics card