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 When performance is your priority, rely on proven, trusted technology. With the cylindrical lithium-ion battery cell your laptop gets stable power that’s great for high-performance devices. Lithium-Ion (Li-Ion) Hard Drive HDD HDMI 1 HP 635, AMD E, 1.65 GHz, 15.6", 1366 x 768 pixels, 4 GB, 500 GB HP 635. Processor family: AMD E, Processor model: E-450, Processor frequency: 1.65 GHz. Display diagonal: 15.6", Display resolution: 1366 x 768 pixels. Internal memory: 4 GB, Internal memory type: DDR3-SDRAM. Total storage capacity: 500 GB, Storage media: HDD, Optical drive type: DVD Super Multi DL. On-board graphics card model: AMD Radeon HD 4250. Operating system installed: Windows 7 Professional. Weight: 5.51 lbs (2.5 kg)