Sorry to make you have such doubts.
We don't have a product interface because we are still in the process of development, of course, if you would like to know more, I can send you the design drawings of the product individually. I've already had many users contact me and look at the design of the product individually, and they all think it's a very good product!
The purpose of publicizing the product in advance is also because we are an independent developer, we can receive more feedback from users during the development process, which helps us to make a better product!