The only difference between the "N" versions of the Airconsole-TS products is the inclusion/exclusion of a cable kit.

The TS-4, TS-8 and TS-12 come with a cable kit containing lightweight 1.8m console cables with RJ-45 connectors on each end (4/8/12 cables depending on product).

The TS-4N, TS-8N and TS-12N do not come with a cable kit and require you to supply your own cables.

For more details see the relevant product pages: