When you order the VHF, you'll want it "unlocked" by the seller if you can arrange it so you can program in the frequencies & tones. There are common "Hummer" frequencies and tones that Hummer owners typically use & have licensed for off-road communication.
I'm lucky, a buddy of mine has a spare Kenwood handheld VHF, so I don't have to buy one.
BTW - Don't use HUMMER Channel 7 in Moab or you'll be talking over a local trucking company and you'll get a visit from the FCC, ask Harley Dave (GMPartsGuy) how I know
