The product is discount for sale during china 2016 National's Day , purchase to visit : www.fondsale.com Operating System: Mac OS X Mavericks CPU family: Intel Core i7 4-generation family CPU Type: Intel Core i7 4770HQ CPU frequency: 2.2GHz Core frequency: 3400MHz Bus Specifications: DMI 5 GT / s Three cache: 6MB Core Architecture: Haswell Core / thread count: quad-core / eight thread Process Technology: 22nm Instruction Set: AVX2,64bit Power: 47W Memory capacity: 16GB (8GB × 2) Memory Type: DDR3LP (low-power version) 1600MHz The maximum memory capacity: 16GB Hard disk capacity: 256GB Hard to describe: SSD Solid State Drive Drive Type: no built-in optical drive Touch screen: does not support touch Screen size: 15.4 inches Aspect ratio: 16: 9 Screen Resolution: 2880x1800