Swan allows you to set up automatic Bitcoin withdrawals to a wallet that you have saved with Swan. To set up Bitcoin auto-withdrawals, log in, and navigate to your auto-withdrawals section.
You will need to have already added a single or multi-address to Swan before setting up the auto-withdrawal.
Note: Once triggered, it will withdraw all unlocked Bitcoin to the address(es) you have designated.
Read here for instructions on how to connect multiple addresses at once.