This is a video input kit for adding an external input terminal to Toyota's display audio system. With this, you can connect smartphones, BD/DVD players, etc., and enjoy video content on the display audio. It is compatible with vehicles equipped with the dealer-installed CD/DVD deck. A separately sold HDMI conversion adapter "HDA433 series" is required to connect HDMI output devices. There are no noticeable stains, but there is double-sided tape stuck to the back, making it a bit sticky.