The TAMRON TAP-in Console is a product that attaches to compatible Tamron lenses and allows users to update lens firmware and customize various settings using dedicated software on a personal computer connected via USB. With the introduction of the TAP-in Console, users can update firmware themselves anytime, anywhere, provided they have an internet connection. Furthermore, because it allows you to change various lens settings, you can customize it to suit your usage. For Nikon I am selling this because I don't use it.