Manufacturers of two-way radios tend to be very optimistic when they discuss maximum range. Minor terrain features like hills, trees, buildings, etc. all significantly reduce the useful range of VHF/UHF frequency devices. Generally, you would not get a 10 mile range unless you have a direct line of sight between the two units. So, if you are both on separate mountaintops, or one person is in an aircraft, you might get the published range. Otherwise, forget it.

My experience with handheld ham radio VHF/UHF tranceivers is that, with 5 watts, you are lucky to get more than a couple miles in typical terrain. A cheap $60 handheld is unlikely to have even that much power, and probably not have a very sensitive receiver.