The Boox Tab Ultra is an e-ink tablet that runs Android. It's unlike anything else on the market, and while it is expensive, it's also a delight to use.
Ony Boox Note Air 3C Review : r/Onyx_Boox
My first impressions of the Onyx Boox Tab Ultra C, by Cato Minor
Onyx Boox Tab Ultra C Review: At Last, a Color E Ink Tablet - CNET
ONYX BOOX Tab Ultra E Reader :: ONYX BOOX electronic books
Onyx Boox Tab Ultra review: an Android tablet unlike any other
Onyx Boox Tab X: Zoomed in
A Mindfulness Monday Review of the Onyx Boox Tab Ultra – The Sweet Setup
Onyx Boox Tab Mini C review: an ereader that's colorful and compact, but expensive
BOOX Tab Ultra C Pro color ePaper tablet review - versatile tablet that's easy on the eyes - The Gadgeteer
Onyx Boox Tab Ultra Review: Powerful, Paper-Like Tablet Experience