Processor: 2.2Ghz, 2.5Ghz, or 2.8GHz Intel quad-core i7 processors
Retina Display: 15.4-inch (diagonal) Retina display with higher efficiency LEDs
Memory: 16GB onboard, not user installable
Storage: 256GB, 512GB, 1TB flash storage
Graphics: Haswell Iris Pro Graphics (Integrated Graphics)
Trackpad: Force Touch trackpad technology