Display: Retina display: 15.4-inch (diagonal) LED-backlit display with IPS technology Processor: 2.6GHz quad-core Intel Core i7, Turbo Boost up to 3.5GHz 2.7GHz quad-core Intel Core i7, Turbo Boost up to 3.6GHz Memory: 16GB of 2133MHz LPDDR3 onboard memory Storage: 256GB PCIe-based onboard SSD 512GB PCIe-based onboard SSD Graphics: 2.6GHz – Radeon Pro 450 with 2GB of GDDR5 memory and automatic graphics switching Intel HD Graphics 530 2.7GHz – Radeon Pro 455 with 2GB of GDDR5 memory and automatic graphics switching Intel HD Graphics 530 Wireless: Wi-Fi 802.11ac Bluetooth 4.2 Battery: Up to 10 hours wireless web Other: 720p FaceTime HD camera Backlit keyboard with ambient light sensor USB-C Headphone port Touch Bar with integrated Touch ID sensor