I have a GP300 repeater. A Motorola one that is similar. We use it at a Roadrally we have in southern Missouri. As in VHF Comms, height is a strong factor in range so from 150 agl, we get 35 miles range. Power output is 28 watts into a Hustler G4-144 antenna. The area is mostly hills, and heavy trees. The rocks have a high lead content. From a lower elevation, 20-30 feet, range will not be much more that radio to radio. If the radio antenna is in the middle, you will have increased range, over radio to radio contact.