Sharing a presentation on two ipads

I am wondering if anyone knows of an app that would help me reduce some paper usage in my office. My situation is this:

I am a salesperson and I present an introductory presentation to each new client. The presentation is in powerpoint format and is normally printed off. I am looking for an app that will duplicate my ipad's screen onto another ipad, thus allowing me to flip through the presentation on my ipad and have it mirrored on the client's. The easy solution would to just bring up the presentation on both and have the clients scroll along with me but I would prefer to have control over what is shown their screen.

Any ideas?