Handhelds as are VHF and UHF are generally line of site. Top of mountain to another top of mountain visible could be 20 miles. But usually, 2-5 miles is all to expect over flat ground. In trees and hills mileage may be less. But you have posted about an amateur radio, IC7000 so assuming you are a licensed ham, ask some of the hams in your area what mileage they get. Some people will connect HH to outside antenna and get a little more mileage. Wouxun radios are generally OK for a CCR [Cheap Chinese Radio] but a bear to program in the field. There is programable software and cables available that make this a lot easier. Don't know about this model, but most Wouxun HH will run battery down when connected in about a month. So if not using it for a while, should disconnect battery.