I had to laugh - sorry, but that site seems to have some very peculiar reviewers! Why on earth would you think a hand-held radio could cover a 1000 miles? A hand held radio is totally subject to geography and more specifically topography. We always talk about line of site - so most hand held radios being low to the ground, in open countryside might manage 10 miles if you keep the radio up high. If you put the radio in your jacket, the chances of you hearing the ten mile away person call are slim. In urban areas with buildings, range could be half a mile. If you could have a 100W handheld, it really wouldn’t perform much better. Height is the real key to range. If you have cellular phone service at both ends then a handheld IP based radio using a cellular data SIM would remove the distance issue totally. Anywhere in the world with cell signal and the radio works.
Handhelds can get better coverage using repeaters - the ones on mountain tops give excellent coverage of the surrounding valleys - even when the mountain is between the users. Any review where they talk about range should ring warning bells immediately because range is a function of antenna and height predominantly - technical standards, power and frequency band are much less important. HF, VHF and UHF types do perform differently, but not as much as you would imagine. The HF radios - CB, in the main - don’t work that well because the antennas perform poorly - not a huge amount of signal actually gets out, and again, on receive they’re hardly well performing devices. UHF vs VHF differences are a little to do with antennas but I tend to find UHF works better in urban areas and VHF in rural ones. Many would disagree. if you every see a radio being sold with a tag line of miles in the advert, treat it as suspect. 10 mile range I’d find advertisingly acceptable, but the minute they mention 30 mile+ I start to grin, and 1000 miles is just insulting. Years back, I spoke to an astronaut on half a Watt on UHF. I was trying to talk to a friend two miles away, and he couldn’t hear me - but the astronaut did, in Skylab - the US early orbiting space vehicle - and we had a very nice chat. On half a Watt! Practically, even at sea, with no obstacles, the curvature of the earth means that if you can just graze the horizon, then your maximum range will be just under double the distance to the horizon. The horizon is not very far, at sea level, with your radio - the horizon is just over 3 miles, so your maximum range about 6. You can roughly calculate range by distance = the square root of the antenna height in feet. so 9ft high gets you 3miles (a little more actually). An antenna at 16ft gets you 4 miles and 25ft gets you 5 miles and so on - remember it grazes the earth and carries on, so you add in the antenna height the other side of the horizon - so an antenna 16ft high and 25ft high will give you a range of 9 miles. Water is the optimum distance, add a hill or two and the range plummets.
In one review they say “Generally, please make sure batteries are definitely charged and inserted properly before use in a generally big way.” - a good indication an idiot decided on the wording.