The problem with these is the range limitation, which on this is only 20m. This range will also be more limited due to things like buildings etc interfering with the line of sight and also if the receiving antenna is in the van it adds to the interference. You can get longer range ones that may serve the purpose better. These have been discussed on the forum before with mostly negative views. The idea is a brilliant one that would be used by most windies if only the range/ line of sight problems could be sorted. I'm sure that eventually some of the larger suppliers will take this idea on and put their minds to improving them so they would be ideal for us windies.