A lot of recent lenses for mirrorless cameras are pretty clever but they’re not exactly ‘smart’ by the current popular definition of the word. That all changes if you plug in the Tamron-Link to the USB-C port featured in most recent Tamron lenses. I say ‘most’ because Fujifilm X-mount versions of Tamron lenses don’t feature a USB port, making them incompatible with the adapter, and it doesn’t really work with Canon RF versions of Tamron lenses, at least not as yet. However, you can still update the firmware of Canon RF mount Tamron lenses that feature a USB port, using the Desktop version of the free Tamron Lens Utility program for Apple and Windows computers.
It’s much better news for most (but not all) recent Tamron lenses for Nikon Z and Sony E mount cameras, although some might need a firmware update to be applied via the desktop app before you can use the Bluetooth adapter. The end result is that you can add a whole bunch of smart features for customization and remote control of compatible Tamron lenses, via the Tamron Lens Utility app, offered as a free download for Apple and Android smartphones. Understandably, you have to buy the actual Tamron-Link Bluetooth adapter itself, but I think it’s well worth the outlay as it brings a whole new, enriched experience to using compatible Tamron lenses.