The system features a 2.6 GHz Intel Core i7 quad-core processor, 16GB of 2133 MHz LPDDR3 onboard memory, a 256GB PCIe-based SSD, four Thunderbolt 3 (USB Type-C) ports, a 50% larger Force Touch trackpad, a keyboard with a 2nd-gen butterfly mechanism, stereo speakers with double the dynamic range of its predecessor as well as improved bass, 802.11ac Wi-Fi, Bluetooth 4.2 wireless technology, and even a 3.5mm headphone jack. macOS Sierra is the installed operating system.