As you say, easy to install. 12v fused supply needed but then need SWR meter to set ariel length. Once that done, no problem except there is no one out there using the bloody things!!!!! Went from Peterboro to Folkstone, not one reply to a shout and this down the A1 including a jam on Dartford Bridge. Other than EBI travelling with Graham L, have not found anyone anywhere using the things. Have been serously jarred, expected lorry drivers to be out there at the very least, but not a sausage. The benefits are fantastic, so why does no one use the system???? Looks like it will have to be just amongst a closed few on a trip, what a waste, could make any run so much easier and hassle free........