E-ink Screen
The thing that makes an e-reader unique is the so-called E-ink screen. An E-ink screen is much more energy efficient than a screen in a tablet or laptop, for example. This energy efficiency gives you a battery life of sometimes weeks. Also, an E-ink screen is non-reflective or matte. This ensures that your e-book remains easily readable, even in direct sunlight. Finally, with an E-ink screen you won't get eye strain when reading in the dark.
