This includes access to Kindle Unlimited for free for a year and a limited edition rustic brown leather book cover. In addition, the Fire OS “Bellini” on the Reader’s Edition HD 8 features Blue Shade that automatically adjusts the brightness and optimises the content being displayed on the screen to reduce exposure to blue light. Research has shown that the blue light emitted from the display of smartphones and tablets increases the time it takes for one to fall asleep, delays REM sleep and reduces the overall alertness next morning. However, with Blue Shade functionality on Fire OS, this will be the last thing that its owners will have to worry about.
