ENERGY STAR® is the government-backed symbol for energy efficiency, providing simple, credible, and unbiased information that consumers and businesses rely on to make well-informed decisions. ENERGY STAR is the simple choice for energy efficiency, making it easy for consumers and businesses to purchase products that save them money and protect the environment. ENERGY STAR Legacy Intel® Core™ Processor Intel Core i5-xxx DELL Latitude E6510, Intel® Core™ i5, 2.66 GHz, 39.6 cm (15.6"), 4 GB, 250 GB, Windows 7 Professional DELL Latitude E6510. Form factor: Clamshell. Processor family: Intel® Core™ i5, Processor model: i5-560M, Processor frequency: 2.66 GHz. Display diagonal: 39.6 cm (15.6"). Internal memory: 4 GB, Internal memory type: DDR3-SDRAM. Total storage capacity: 250 GB, Storage media: HDD, Optical drive type: DVD-RW. On-board graphics card model: Intel® HD Graphics. Operating system installed: Windows 7 Professional. Product colour: Black. Weight: 2.51 kg