Processor Intel Core i5 Quad-Core Base Clock Speed 2.8 GHz Max Boost Speed 3.3 GHz Memory Type 1867 MHz LPDDR3 SDRAM Graphics Card Intel Iris Pro Graphics 6200 Display Panel Type IPS Size 21.5" Aspect Ratio 16:9 Native Resolution 1920 x 1080 Viewing Angle 178° Horizontal, 178° Vertical External Resolution Up to 4096 x 2304 Drives Storage Drive 5,400 rpmHDD; SATA Optical Drive None Input/Output Connectors Ports 2 x Thunderbolt 2 4 x USB 3.0 Type-A Display 2 x Mini DisplayPort via Thunderbolt port Audio 2 x Integrated Speaker 2 x Integrated Microphone 1 x 1/8" (3.5 mm) Headphone/Microphone Combo Jack Media Card Slots SD/SDHC/SDXC Communications Network 1 x 10/100/1000 Mbps Gigabit Ethernet (RJ-45) Wi-Fi 802.11ac; Dual-Band Bluetooth Bluetooth 4.0 Webcam Yes General Operating System Mac OS X 10.11 El Capitan Security Kensington Lock Slot Power Requirements 100-240 VAC, 50-60 Hz Dimensions (WxHxD) 20.8 x 17.7 x 6.9" / 52.8 x 45.0 x 17.5 cm