Amazon has unveiled a new pair of Kindle Paperwhites on its site Tuesday. The set includes a marked-up 3G version that's available at a significant premium over the Wi-Fi only Paperwhite.

The product page claims that the Paperwhite’s new screen is whiter with darker text and turns pages 25 percent faster compared to the previous version. The new version still has a built-in light as well. Users can now flip through a book or document without losing their place, add in-line footnotes, and share their books on Goodreads. Amazon will be bringing the Kindle Freetime feature to regulate kids’ usage of the device to the Paperwhite.

The devices retain the same 2GB of storage and six-inch 212 PPI screen with 16-level gray scale, so it’s unclear how Amazon is attaining the better levels of contrast cited above. However, the specs cite “exclusive Carta e-paper technology.” The new Wi-Fi Kindle Paperwhite is slightly lighter at 7.3 ounces to the original’s 7.5 ounces, but the battery life remains the same at a claim of up to eight weeks with a half hour of reading per day with Wi-Fi off.

Both versions are now available for pre-order at $119 with “special offers" ads ($139 without) for the Wi-Fi version set to ship September 30 and at $189 for the 3G version shipping November 5.