The Sprint review meeting is time-boxed to 4 hours.
The Team should not spend more than 1 hour preparing for the Sprint review.
The purpose of the Sprint review is for the Team to present to the Product Owner and stakeholders functionality that is done. Although the meaning of "done" can vary from organization to organization, it usually means that the functionality is completely engineered and could be potentially shipped or implemented. If "done" has another meaning, make sure that the Product Owner and stakeholders understand it.
Functionality that isn’t "done" cannot be presented.
Artifacts that aren’t functionality cannot be presented except when used in support of understanding the demonstrated functionality. Artifacts ...