15.4-inch (1440 x 900) LED Display Intel Core i5-520M Processor (Dual-Core . 2.4GHz . 3MB Cache) 4GB DDR3 System Memory 320GB (5400RPM) SATA Hard Disk Drive (HDD) Dedicated NVIDIA GeForce GT 330M Graphics (256MB Dedicated Video Memory) SuperMulti-DVD Burner 2 x USB 2.0 . 1 x DisplayPort Backlit Standard Keyboard 1MP Webcam and Integrated Microphone 10/100/1000 Gigabit Ethernet . IEEE 802.11a/b/g/n and Bluetooth 2.1 + EDR 6-cell Lithium-Polymer Battery with up to 8 hours of use Operating System: Apple Mac OS X 10.6 1" x 14.1" x 9.6" (HxWxD); 5.4lbs Energy Star Compliant