Hello, thank you for your interest in our products.
I will answer your questions in turn.
1. The WIFI function is still under development and not yet open. It will be open later, you need to build your own server, you can download project files as well as communicate through wifi.
2. We provide 3.5 inch-10.4 inch full series size, today the official website will update all the models, you can leave a message through the official website or contact the official website email to consult.