ruler kit (kx-b05) can not be used with the interactive function.
(1)the markers (big) and the eraser are used for other than the interactive function.
(2)the markers for interactive (small) are used while inserted in the pen holder. the electronic pen [a marker for interactive (small) inserted in the pen holder] and the electronic eraser are used with the interactive function.\
(3)pc interface (option) when the optional pc interface kit (kx-bp095) is used, you can scan monochrome images from the kx-bp800 into a computer running microsoft?windows?or windows nt?and print documents on the computer to the printer of the kx-bp800.