Detailed Specifications:
Model: A1398 (Mid-2014) 
Processor: 2.2GHz quad-core Intel Core i7 (Turbo Boost up to 3.4GHz) 
Memory: 16GB of 1600MHz DDR3L onboard memory 
Storage: 256GB PCIe-based flash storage 
Display: 15.4-inch Retina display with a resolution of 2880x1800 
Graphics: Intel Iris Pro Graphics 
Connectivity: 802.11ac Wi-Fi, Bluetooth 4.0, 2 x Thunderbolt 2 ports, 2 x USB 3.0 ports, HDMI, SDXC card slot 
Operating System: Pre-installed with OS X Mavericks (10.9.4), and can be upgraded to macOS Monterey 
Battery: Built-in 95-watt-hour lithium-polymer battery 
Size and Weight: 0.71 inch (1.8 cm) high, 14.13 inches (35.89 cm) wide, 9.73 inches (24.71 cm) deep, and weighs 4.46 pounds (2.02 kg) 
Keyboard: Full-size backlit keyboard with 78 (U.S.) or 79 (ISO) keys 
Trackpad: Multi-touch trackpad