This adds a small jack connector directly to the link port, so you don't need a link cable.

For syncing POs etc:

And Game Boys:

Not suitable for data, only clock. Fits all GB models except for GBA SP (blocks the power/audio connector).


Looks awesome!

Any chance of an update to iOS/android Nanoloop to support this type of sync as a slave?

An extra adaptor [1] would be needed to separate the aux-in. But it would unify all the nanoloops somewhat.