Sony PRS 350
Asus Eee Reader DR900
Elonex eInk 621EB eBook
Self-lit devices have a back or front light incorporated, so they can be used in poor light conditions or in the dark.
An e-paper display provides a high contrast allowing users to read in direct sunlight without requiring much power.
You can operate the device easily, by pressing the screen with your fingers.
The bigger the screen size is, the better the user experience.
Irex Technologies Digital Reader 1000SW
More screen shades (greys) result in better gradients and usually a better reading experience.
Amazon Kindle Oasis (2017) WiFi 8GB
The device has a display with three full subpixels per pixel, resulting in a sharp and crisp picture. Pixels in some displays (like AMOLED) share one subpixel to preserve space. This can result in a less crisp, slightly blurred image.
The device has a standard memory slot (such as an SD or micro SD card slot) so that you can either extend the internal storage with affordable memory modules or you can retrieve data, such as photographs, easily from a memory card.
Sony PRS 600
802.11n is a wireless standard released in 2009. It has faster transfer rates and improved security compared to its predecessors - a, b and g.
With a search browser application you can surf the internet from your device.
The device can connect to WiFi.
The battery can be recharged and used over again.
How many file types the device supports, such as PDF, JPG or PNG.
Barnes & Noble NOOK HD Smoke 8GB
The device has a dictionary that can be accessed offline.