This device is primarily geared towards taking notes and editing PDF files, the A4 screen can read them, without having to pinch and zoom. The resolution is 2200×1650 with 207 DPI, which will be great for reading ebooks. The Onyx Boox Max Lumi features a 13.3 inch E INK Mobius and Carta HD display, with a PMMA flat cover-lens. All of this comes at a cost, it retails for $879. PDF documents are at its mercy, thanks to the A4 screen. It is oozing bleeding edge performance and power. Meanwhile, the Max Lumi is likely the best 13.3 inch that the company has ever made. Not to mention, it is very affordable, it retails for $479. This really shows how an all new design and refined stylus can resonate with so many people. There has been such strong demand, that it has sold out three times, in less than a month. The Onyx Boox Note Air is one of the most financially successful digital note taking devices of 2020.