I used to be a technical writer and can take up that mantle again.
We need a picture of the product for placement within the advertisement. A general description of the product.
If electronic, does it use batteries, what type of power source etc.
If a lotion, tincture, salve, what are the ingredients of your creation.
Physical size, weight of package with what type and style of packaging.
Bigger than a bread box, smaller than a toaster.