A few questions:
How are you dealing with Google?. I mean e-ink devices don't pass the
Compatibility Test Suite and that means they can't be accesing privative google services, like the Playstore. Are you going to spoof a device fingerprint from another manufacturer like Boyue is doing?.
How are you dealing with your customers? Do you release the source code for the parts that are GPL? Do you include acknowledge of 3rd party software used by your program like Apache, BSD and MIT licenses require?
How are you dealing with developers? Do you plan to release an SDK for third parties in order to take advantages of the device (eink refresh, wacom stylus...)?
Are you going to sell in America/Europe? FCC?
I did a bit of research and it seems to me yet another Netronix copycat. (Netronix designs, assembles, develop software) and the retailer just label the device within a new brand. These kind of products are the most common nowadays. Most of them are based on IP thief of common software (FBReader or Artifex MuPDF). It should be easy to solve all these issues just by complying with software licenses.
Thanks for your time