This depends on national radio regulations. In general 2.45 GHz can be used all over the world, and some of the 400/800/900 MHz band modules can also be used in most countries. The 169 MHz band is license free only in Europe. A quick overview is given in the Product Number Overview https://radiocrafts.com/uploads/radiocrafts_product_number_overview_20151027.pdf

Last Update: August 8, 2017