Copy this framework. You can tailor it a bit to sound like you and be unique.

Hi (first name),

I am emailing you with more information about (desired result)

We can help you achieve (desired result) by (insert a brief summary of your method(s)) in (time frame) with little to no ongoing work or time required on your end.

Let me know if you want me to send over that 3-minute Loom I made explaining more about it.

Talk later,

(Name)

(Company)

PS. (Authority building statement)