2km RF modules, they don't work

I bought these

seeedstudio.com/depot/2km-lo … th=139_140

modules for airplane to transmit live system data back to ground station. As it turns out, these modules don’t have any code documentation, i cannot get it working with arduino properly. So where exactly are those “Rate: <5Kbps” when there’s like 500ms latency to get signal on pin from TX to RX? Missing some code?