21.5" Retina 4K IPS Display4096 x 2304 Screen Resolution3.1 GHz Intel Core i5 Quad-Core8GB of 1867 MHz LPPDR3 Onboard RAM2TB Fusion DriveIntegrated Intel Iris Pro Graphics 6200802.11ac Wi-Fi, Bluetooth 4.0Thunderbolt 2 + USB 3.0Magic Keyboard & Magic Trac...