It seems crazy to me to pay $300 for a reusable e-ink label when there are countless of them on the market for 1/10th the cost. here is an example, granted its smaller but even the 7x7 inch displays are less than $100.

https://a.co/d/9ahbNhQ

The only downside is that if you down want to use a phone to update them, getting hardware and software them to update them quickly was seemingly impossible.