Part of your on-site interview may be to present your research or give a teaching demonstration. For a research presentation, consider who you will present to, what they would expect, how long the talk should be, and the overall focus (one project, multiple projects, or potential postdoc projects). In an academic or government research postdoc, you can present your research like a typical seminar. Focus on projects that are most relevant to that research group. Presenting for industry research postdocs is similar, and you should also emphasize the technical and collaborative skills you used in your projects.
Bring all of the technology you will need for the presentation, including computers and adapters. Save copies of your presentation on your computer, USB drives, cloud servers, and in an email to yourself. Practice your presentation multiple times with others before your interview.