Processor 3.6GHz quad-core 8th-generation Intel Core i3 processor   Memory 8GB 2400MHz DDR4 memory   Storage 256GB SSD storage1   Graphics Radeon Pro 555X with 2GB of GDDR5 memory   Video Support and Camera FaceTime HD camera   Simultaneously supports full native resolution on the built-in display at 1 billion colors and:   One 5120x2880 (5K) external display at 60Hz with support for 1 billion colors, or   Two 3840x2160 (4K UHD) external displays at 60Hz with support for 1 billion colors, or   Two 4096x2304 (4K) external displays at 60Hz with support for millions of colors   Thunderbolt 3 digital video output   Native DisplayPort output over USB-C   Thunderbolt 2, HDMI, DVI and VGA output supported using adapters (sold separately)   Input/Output SDXC card slot   Four USB 3 ports (compatible with USB 2)   Two Thunderbolt 3 (USB-C) ports with support for:   DisplayPort   Thunderbolt (up to 40 Gb/s)   USB 3.1 Gen 2 (up to 10 Gbps)   Thunderbolt 2, HDMI, DVI, and VGA supported using adapters (sold separately)   10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector)   Kensington lock slot   Audio Stereo speakers   Microphone   3.5 mm headphone jack   Support for Apple iPhone headset with microphone   Wireless 802.11ac Wi-Fi wireless networking; IEEE 802.11a/b/g/n compatible   Bluetooth 4.2 wireless technology   Size    Height: 17.7 inches (45.0 cm)   Width: 20.8 inches (52.8 cm)   Depth: 6.9 inches (17.5 cm) with stand