Can i buy power supply adaptor from other company for my product. sell it with my product without legal issue?

I am planning to open a small bussiness, I am going to sell a product which I will make. however, my product will be needing an power supply adaptor to work. Since I cannot make power supply adaptors on my own can i buy it from other company or shop and sell it with my product. Will there be any legal issues with... show more I am planning to open a small bussiness, I am going to sell a product which I will make. however, my product will be needing an power supply adaptor to work. Since I cannot make power supply adaptors on my own can i buy it from other company or shop and sell it with my product. Will there be any legal issues with the adaptor making company? Can i do this without informing the other company or without any tie-ups. Thank you.
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