Apple 13.3" MacBook Air dual-core Intel Core i5 1.8GHz, 8GB RAM, 128GB Flash Storage, Intel HD Graphics 4000, Mac OS X Lion Processor: Intel Core i5 Dual-Core 1.8 GHz RAM: 8 GB DDR3 SDRAM Hard Drive: 128 GB Flash Storage Graphics Card: Intel HD Graphics 4000 processor; Dual display and video mirroring: Simultaneously supports full native resolution on the built-in display and up to 2560 by 1600 pixels on an external display, both at millions of colors OS: Mac OS X Lion