Onyx says it is the only company that makes E Ink devices with screen sizes ranging from six inches to 13 inches. I was recently sent its latest offerings, the 13.3-inch Boox Max Lumi2 and the smaller 10.3-inch Boox Note Air2. There are some shared characteristics, including the ability to function both as an e-reader and as a content creation device. Also, both devices deploy the same Android 11 operating system and user interface, and both use the same stylus.