As widely anticipated, Amazon has refreshed its popular Kindle Fire tablet, revealing a revamped 7 inch model and a new, more powerful 8.9 inch HD model.

Unveiled today at Amazon’s Los Angeles press event, the updated Kindle Fire keeps the original’s 7 inch display and boasts a new, faster processor which will boost performance by 40 percent according to Amazon, twice the RAM of the original model and a longer battery life. The new Kindle Fire will retail for $159 when it ships on September 14, strategically undercutting the price of Google’s fast-selling Nexus 7 Android tablet, which costs $199 for the 8 GB model.

Amazon’s new Kindle Fire HD is 8.9 inches with a 1920 x 1200 display. Physically, the new tablet is 8.8 mm thick and weighs in at 20 ounces. The processor is a TI OMAP 4470, which Amazon claims can process 50 percent more operations per second than the standard Kindle’s Tegra 3 chip. Amazon has also added stereo speakers and dual band Wi-Fi antennas. The Kindle Fire HD only comes in a 16 GB model. It will cost $299 and a 4G LTE model will also be available for $499. Data plans will cost $49.99 per year and will cap at 250MB of data per month. The Kindle Fire HD will ship on November 20.