Lightning fast, 2.3 - 3.5 GHz Quad-Core i7 CPU 16GB system memory (RAM, maximum amount) Monster, faster than the stock SSD, 1 TeraByte SSD Retina display, 15.4" screen that display crystal-same, colour-accurate at 2880 x 1800 pixels - 1.5GB video memory This model supports a simultaneous maximum resolution up to 2560x1600 on two external displays via Thunderbolt. Alternately, it can support a single display up to 2560x1600 via Thunderbolt and a single 1080p display at up to 60 Hz, 3840x2160 at 30 Hz, or 4096x2160 at 24 Hz via HDMI. Running the absolutely current operation system. OSX Catalina AirPort Extreme WiFi 802.11ac Bluetooth 4.0 Full-size, backlight keyboard SDXC slot 8-hour battery life (depending a bit on what you are doing) Can run Windows 7 - 10 4.46 pounds 2 x Thunderbolt 1 x HDMI 2 x USB 3 Audio in/out