The bandwidth is pretty good, considering those super high res photos they send back. There's space in between, and Mars has a very thin atmosphere, so you can

The bandwidth is pretty good, considering those super high res photos they send back. There's space in between, and Mars has a very thin atmosphere, so you can communicate with radio quite well I'd bet. Latency is indeed a major issue, it's about 11.5 minutes per direction. The newest rover actually has some A.I. for that reason to let it drive autonomously and not always have to wait for next commands from Earth.