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 HP 6735b, 2.1 GHz, 15.4", 1280 x 800 pixels, 2 GB, 250 GB, Windows Vista Business HP 6735b. Processor model: RM-72, Processor frequency: 2.1 GHz. Display diagonal: 15.4", Display resolution: 1280 x 800 pixels. Internal memory: 2 GB, Internal memory type: DDR2-SDRAM. Total storage capacity: 250 GB. Discrete graphics card model: AMD Mobility Radeon HD 3200. Operating system installed: Windows Vista Business. Weight: 5.95 lbs (2.7 kg)