This is a kit that allows you to watch the factory navigation system of a Nissan X-Trail NT31 while the vehicle is in motion. The factory navigation system does not function even when grounded to the parking brake! This kit is required. I purchased this kit, but the vehicle I intended to install it on was an NT32, and I mistakenly ordered the NT31 version. I was unable to return it, so I am selling it. The purchase price was 23,000 yen! I think it's a great deal for anyone who needs it. Installation requires someone with knowledge of electrical systems. It is new, but the package has been opened. Please note that it may be possible to use this kit with the factory navigation systems of other Nissan vehicles, but I am not sure. Please check the data on the back of the box in the photos to confirm compatibility.