source: The Kindle 2 features 16-level grayscale display, improved battery life, 20 percent faster page-refreshing, a text-to-speech option to read the text aloud, and overall thickness reduced from 0.8 to 0.36 inches (9.1 millimeters).
target: The Kindle 2 features several technological advances.
references: The Kindle 2 features several technological advances. The Kindle 2 has 16 level gray colors shown, better battery life, 20 % faster page speed, text-to-speech to read words for you aloud, and thickness down from .8 to .36 inches  (9.1 millimeters). The Kindle 2 features 16-level grayscale display, better battery life, 20 percent faster page-refreshing, a text-to-speech option, reduced thickness. The Kindle 2 has attractive features. It has multiple levels of grayscale display. The Kindle 2 is thinner. It has a better battery life. Pages refresh faster now. It will also read text to you. The Kindle 2 features 16-level grayscale display and improved battery life. It also has 20 percent faster page-refreshing, a text-to-speech option to read the text aloud, and overall thickness reduced from 0.8 to 0.36 inches (9.1 millimeters). The Kindle 2 has 16-level grayscale display and a longer battery life.  It also refreshes the page faster, can read the text out loud and is thinner. The Kindle 2 has a grayscale display, better battery life, faster page-refreshing, options for text to speech and reading, and reduced thickness. The kindle 2 is faster, has a better battery, and is thinner. The Kindle 2 has many upgraded features such as improved battery life and faster page refreshing, in addition the overall thickness has been reduced. Features of the Kindle 2 include a 16-level grayscale display, improved battery life, 20 percent faster page-refreshing, and a text-to-speech option, and reduced overall thickness.