Thank you very mutch Butters and Miroslav.

I know the universal patcher but i dont think that it do what i want. With this i can bypass the region limitation but i cant change the frecuence of a collar. I will test it anyway.

Miroslav: "Devices from Croatian and Germany use same frequency (155,450 MHz) and I have information on Croatian device from Germany collar. I have tried with Alpha 100 and T5."

This part its interesant, how do you move information of a croatian to germany?

Thank you very much