@marktheknife thanks for answering… yes, I found this. So it should be just fine buying it from Amazon UK… Only problem for now it is expensive… with postage is around 240 GBP… And ones for 60 GBP do not send to Croatia, don’t know why…
CEPT* - 868.40 MHz, 869.85 MHz - 230 V - 50 V
CEPT is the European regional organisation dealing with postal and telecommunications issues and presently has 45 Members: Albania, Andorra, Austria, Azerbaijan, Belarus, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Moldova, Montenegro, Monaco, Netherlands, Norway, Poland, Portugal, Romania, Russian Federation, San Marino, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, The former Yugoslav Republic of Macedonia, Turkey, Ukraine, United Kingdom, and Vatican.