Bluetooth is a proprietary open wireless technology standard for exchanging data over short distances (using short-wavelength radio transmissions in the ISM band from 2400–2480 MHz) from fixed and mobile devices, creating personal area networks (PANs) with high levels of security. Y 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 i3-xxx HDMI 1 HP ProBook 4520s, Intel® Core™ i3, 2,4 GHz, 39,6 cm (15.6"), 1366 x 768 pixels, 2 GB, 250 GB HP ProBook 4520s. Processor family: Intel® Core™ i3, Processor model: i3-370M, Processor frequency: 2,4 GHz. Display diagonal: 39,6 cm (15.6"), Display resolution: 1366 x 768 pixels. Internal memory: 2 GB, Internal memory type: DDR3-SDRAM. Total storage capacity: 250 GB. On-board graphics card model: Intel® HD Graphics, Discrete graphics card model: Intel® HD Graphics. Product colour: Black. Weight: 2,39 kg