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The 15.4-inch MacBook Pro with Retina display (Mid 2015) was introduced as a performance upgrade delivering the new Force Touch trackpad, faster flash storage, longer battery life and faster discrete graphics than the previous-generation 15.4-inch MacBook Pro with Retina display (Mid 2014). With built-in force sensors and a Taptic Engine that delivers haptic feedback, the Force Touch trackpad allows you to click anywhere with a uniform feel and customize the amount of pressure needed to register each click. The updated 15-inch MacBook Pro with Retina display also features up to 2.5 times faster flash storage than the previous generation, with throughput up to 2GBps, and offers an additional hour of battery life, with up to 9 hours of wireless web browsing and up to 9 hours of iTunes movie playback. In addition, this new MacBook Pro's discrete graphics deliver up to 80 percent faster performance using new AMD Radeon R9 M370X graphics for editing video in Final Cut Pro X, rendering 3D images in pro graphics apps or playing high-resolution games.