• 15.4-inch (diagonal) LED-backlit Retina display with IPS technology; 2880-by-1800 native resolution at 220 pixels per inch with support for millions of colors • Radeon Pro 455 with 2GB of GDDR5 memory and automatic graphics switching • 2.6GHz quad-core Intel Core i7, Turbo Boost up to 3.6GHz, with 8MB shared L3 cache • 16GB of 2133MHz LPDDR3 onboard memory • 720p FaceTime HD camera • Stereo speakers with high dynamic range • Four Thunderbolt 3 (USB-C) ports • Built-in 76.0-watt-hour lithium-polymer battery