Looking for advice for my first sales engineer presentation exercise

I’ve been talking to a company for a sales engineering position for last few weeks and they are wanting to move forward with the technical steps where I will have to present their product to them. I’m new to this. I have more technical background so not so much in the sales side. What should I focus this presentation on? Anything that’s a must have? How deep do I need to make this presentation to be? Any help will be highly appreciated.

Thanks