Investors want to judge whether their investment is safe and will earn them good money. Focus on this.
So, the presentation has to have
Market: Target segment, What value you bring to this segment, orders in hand and/or orders in the pipeline,
Who you are competing against and what new value you bring to the market
Projected cash flow and usage of funds
Experience of the startup partners
Keep everything simple and use few words in the PowerPoint - speak with enthusiasm and use positive body language. Investors want to hear from you much more than see the presentation itself.