Apple’s latest patent is the one that could make it a fully functional stand-alone device.

Apple was just granted a for “modular functional band links” for a wearable device by the U.S. Patent and Trademark Office. The wearable device at the heart of the patent is obviously the Apple Watch, and those modular functional band links will build more functionality into the Apple Watch band.

What kind of functionality? This is the exciting part.

“The electronic components included in the modular functional band links may be any kind of electronic component associated with any kind of functionality,” Apple said in its patent filing.

.