Even during a Sprint Review your Touchscreen can help you. Following a example how.
The Sprint Review shouln't take more time than one hour each sprint week.
Often during Sprint Review a lot of new product ideas and feature request come to mind. For a transparent documentation we suggest the Product Owner to connect his laptop to Brainwrite and type all relevant information into this board. This way the whole team can instantly see what they came up with during the Review.
Also view: How to connect a device to Brainwrite
The whole team can see the defined Acceptance Criteria and the Product Owner has the chance to check them.