The radio can broadcast on one of many frequencies. In many countries, only a portion of those available frequencies are allowed to be used without obtaining a license. So, depending on your geographical location, the useable range of frequencies will be different.
e.g. some countries are more permissive at the 868Mhz end of the range and some are more permissive at the 915Mhz end of the range.
Here is an old post about it from a couple of years ago:
How do I change lora frequency? - SOLVED