Looks like there is a misconception. This functionality does not depend on Bluetooth, but on NFC, which also means that the Nitrokey 3 has to be very close, i.e., touching the smartphone. The function triggered is called NDEF, which your smartphone will understand and send you to a advertised website and no currently there are no plans to make this website changeable as this feature is meant to identify the device, thus the nitrokey.com website.