herman once bubbled...
I just did a little poking around looking for the specs on these radios. Don't count on more than 1/2 mile or so on these little radios. They appear to come in 1/2 to 2 watt versions, all in the 460mhz freq range. Obviously, the 2 watt versions will give you a little better range but not that much better. The 2 mile range they advertise is at optimal conditions, basically, line of site with a full battery and both units working at the top end of their specs. Don't be fooled by the sales hype on the number of useable channels either. You have only the number of channels on the radio (the T6220 has 21). The 38 "codes" are simple CTCSS tones. These are subaudible tones added to the radio signal that open the recievers squelch if the transmitters encoder and the decoder in the reciever are set to the same one. This works fine to keep you from hearing signals with the incorrect tone BUT it will do nothing to help the co-channel interference that WILL happen if others are on the same channel you are on.
These radios are fine for short range chatting but don't count on them for much more than 1/2 mile. If I were buying, I would look for the highest power I could get and the radio should have rechargable batteries. And always remember, NO 2 way radio transmission is private, don't say anything you don't want the world to hear. Anyone with a cheap scanner can listen to these radios.