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 HDMI 1 HP 635, AMD E, 1.6 GHz, 39.6 cm (15.6"), 1366 x 768 pixels, 3 GB, 320 GB HP 635. Processor family: AMD E, Processor model: E-350, Processor frequency: 1.6 GHz. Display diagonal: 39.6 cm (15.6"), Display resolution: 1366 x 768 pixels. Internal memory: 3 GB, Internal memory type: DDR3-SDRAM. Total storage capacity: 320 GB, Optical drive type: DVD Super Multi DL. Discrete graphics card model: AMD Mobility Radeon HD 4250. Operating system installed: Windows 7 Home Premium. Weight: 2.5 kg