Promaster Spectrum 7 Extension Tube Set for Canon EF  type_Projectors The Tamron TAP-in console is

The Tamron TAP-in console is a computer-connected puck that interfaces with select Tamron lenses and allows you to update firmware

and that's why this thing exists

This is for a Four Thirds camera

with original box and AC power adapter

Promaster Spectrum 7 Extension Tube Set for Canon EF &nbsptype_Projectors The Tamron TAP-in console isA set of three extension tubes for Canon EF mount: 12mm, 20mm, and 36mm. These tubes have the electronic contacts necessary to maintain autofocus and autoexposure capabilities. If you're curious about dabbling in macro work, this is an inexpensive way to get started. Good working order, light cosmetic wear. Compatible with EF and EF S lenses.