"I'm name*,
...and I've invented a product that's going to mean <Something relevant / solves a problem reason> - and it's going to have a huge impact on <what it will impact / compete with / solve> when it's eventually released. You can <explain what it does>.
I'm calling because I want to show it to you.
What I have is a genuine game changer that's built around solving <the problem>, that's why it's very important to me.
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If you get a "NO", "Email me", OR Something similar;
A) I'm calling because I want to show it to you in person.
B) I really want to come in, in person. It's super important to me, and I promise, I need to be there and show you in person.
C) You are no where near me, and I am willing to travel all the way there to see you, because I made a small list of companies who are guaranteed to benefit from this - to make it easier for me to filter though.
*Credit Sarah Blakely, Masterclass.