Display: Retina display 12-inch (diagonal) LED-backlit display with IPS technology (2304-by-1440 resolution at 226 pixels per inch with support for millions of colors) 16:10 aspect ratio

Chip: 

-1.1GHz (1.1GHz dual-core Intel Core m3 processor (Turbo Boost up to 2.2GHz) with 4MB L3 cache. Configurable to 1.3GHz dual-core Intel Core m7 processor (Turbo Boost up to 3.1GHz) with 4MB L3 cache.) 

-1.2GHz (1.2GHz dual-core Intel Core m5 processor (Turbo Boost up to 2.7GHz) with 4MB L3 cache. Configurable to 1.3GHz dual-core Intel Core m7 processor (Turbo Boost up to 3.1GHz) with 4MB L3 cache.) 

Memory: 8GB of 1866MHz LPDDR3 onboard memory

Storage: 256GB PCIe-based onboard flash storage | 512GB PCIe-based onboard flash storage

Graphics & Video Support: Intel HD Graphics 515. Dual display and video mirroring: simultaneously supports full native resolution on the built-in display and up to 3840 by 2160 pixels at 30Hz on an external display, both at millions of colors

Wireless:Wi-Fi 802.11ac Wi-Fi wireless networking; IEEE 802.11a/b/g/n compatible | Bluetooth Bluetooth 4.0 wireless technology.

Camera: 480p FaceTime camera

Audio: Stereo speakers Dual microphones 3.5 mm headphone jack. Support for Apple iPhone headset with remote and microphone

Battery: Up to 10 hours wireless web. Up to 11 hours iTunes movie playback. Up to 30 days of standby time. Built-in 41.4-watt-hour lithium-polymer battery. 29W USB-C Power Adapter; USB-C power port

Dimensions (cm) / Weight (Kg): H 0.35–1.31 x W 28.05 x D 19.65 / 0.92 

Software: macOS Sierra