The Onyx Boox Max is a document reader which runs Android and sports a 13.3" E-ink screen. The first orders are just beginning to ship from ereader-store.de, and today a second retailer started taking pre-orders on Amazon.com, Amazon.ca, and Amazon.co.uk.
A new China-based retailer is asking $650 for the Max, and they are promising to ship it by 20 May 2016.
That is a steep price for a device which is too large to be used as an ereader, but if you need a document viewer then this could be ideal. It's cheaper than Sony's writing slate, the DPT-S1, and more versatile.
Sony's device runs a closed version of Android and only supports PDFs. But even with that limitation, it still makes a decent blueprint reader.
The Max, on the other hand, runs Android 4.0 on a dual-core CPU with Wifi and a microSD card slot, and it ships with Google Play. The 13" screen has a resolution of 1600 x 1200, and it has a matching pressure-sensitive stylus (but no capacitive touchscreen or frontlight).
That's rather limited hardware compared to the tablet you can get for the same price, but if it fills a need then it can be worth it.
Assuming that you can put your hands on one, that is.
The new seller is taking pre-orders, and the German seller (ereader-store.de) is now telling customers that they won't be able to ship new orders for 4 weeks, so they are effectively taking pre-orders as well.
So we really don't know when either will be able to ship, but if you do place a pre-order with the new seller you will also get several bonuses: a 32GB microSD card plus reader, and a case.
Is that enough to tempt you into ordering one?