The product is discount for sale during china 2016 National's Day , purchase to visit : www.saleholy.com Product Description Operating System: Mac OS X v10.10 Yosemite CPU: 2.2GHz Quad-core Intel Core i7, Turbo Boost up to 3.4GHz Screen: 15.4" Memory: 16GB 1600MHz DDR3L SDRAM Storage: 256GB PCIe-based Flash Storage Graphics Card: Intel Iris Pro Graphics Communication: Gigabit LAN and WLAN Dimensions (W x D x H): 14.1" x 9.7" x 0.7" Weight: 4.46 lbs. Resolution: 2880 x 1800 WLAN: 802.11ac Wireless LAN Bluetooth 4.0 USB: 2 x USB 3.0