Hi,
There are no parameters in the URL. You just create a product page type menu item and in the "select a product" tab, you select the product you want to display on that menu item and it will do that.
Now if your question is "what would be the non SEF URL I could use to access a product page", my answer would be :
http://www.yourwebsite.com/index.php?option=com_hikashop&ctrl=product&task=show&cid=XXX&name=YYY
where XXX is the product id and YYY the product alias.
But that wasn't your question... So I'm still not sure what you want to know.