How does the warranty. Seller says that I send a card direct

Hi all - I’m new, I’m Italian and I know english slightly

How does the warranty. Seller says that I send a card wifi directly to the mikrotik? Is it true? It is a warm until hot R5h stinks.

No. Mikrotik is the manufacturer. You bought your card from this company, so your warranty contract is also with this company. Return the card to the seller. Not Mikrotik