Un Exterior siren incompatible with us ring alarm

I bought ring alarm kit in the US without the siren because they had no stock!. Recently I travel to Uk And found the siren to complete the system. Guess what? They are not compatible! Any tip?

Hi @Scontegrand. Systems from different regions are not compatible. Although they may look the same, they utilize different Z-Wave frequencies to comply with the regulations of that region. Because of this, different regions device are not compatible.

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