Sony VPC-EE3WFX/BJ Athlon II Dual-Core P340 2.2GHz 4GB 500GB DVD&plusmn;RW DL 15.5" Windows 7 Home Premium w/Webcam & 6-Cell Battery Sony VPC-EE3WFX/BJ Athlon II 2.2 GHz 15.5-inch Notebook General Features: Matte Black color scheme Microsoft Windows 7 Home Premium 64-bit pre-installed w/CoA and reinstallation partition 6-Cell Li-ion battery AMD Athlon II P340 2.2 GHz dual-core CPU 4 GB DDR3 1066 MHz SDRAM (supports up to 8 GB) 500 GB 5400RPM Serial ATA hard drive DVD RW DL drive