CPU : Intel® Celeron® Processor 900 (2.2GHz, 1MB L2 cache, 800MHz FSB) Operating System : Genuine Windows® 7 Home Premium 64-bit Display : 15.6" HD widescreen WXGA high-brightness 1366 × 768 resolution; 16:9 aspect ratio Chipset : Mobile Intel® GL40 Express Memory : 2048MB DDR3 Expandable to 4GB Hard Drive : 160GB SATA Optical Drive : DVD-SuperMulti double-layer (DL) drive Webcam: 1.3 Megapixel Media Reader : 5-in-1 digital media card reader Video : Intel® Graphics Media Accelerator 4500M with up to 1759MB of Intel® Dynamic Video Memory Technology 5.0 supporting Microsoft® DirectX® 10 Audio : Audio support Integrated speaker Integrated microphone Network: Wireless 802.11b/g/n Wi-Fi Certified™ 10/100 Fast Ethernet LAN (RJ-45 port) .