The Onyx Boox Go 10.3 e-reader features an E Ink Carta 1200 display, which typically supports 16 levels of greyscale rather than 256 levels. The available information does not specify 256 levels of greyscale for this model, and E Ink Carta Plus screens commonly provide 16 greyscale levels for clear black-and-white rendering. Therefore, it is most likely that this device supports only 16 levels of greyscale.