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 ProBook 4510s Notebook PC, Intel® Core™2 Duo, 2.1 GHz, 39.6 cm (15.6"), 1366 x 768 pixels, 4 GB, 250 GB HP ProBook 4510s Notebook PC. Processor family: Intel® Core™2 Duo, Processor model: T6570, Processor frequency: 2.1 GHz. Display diagonal: 39.6 cm (15.6"), Display resolution: 1366 x 768 pixels. Internal memory: 4 GB, Internal memory type: DDR3-SDRAM. Total storage capacity: 250 GB. Discrete graphics card model: Intel® GMA X4500HD. Operating system installed: Windows 7 Home Premium. Weight: 2.59 kg https://www.expertreviews.co.uk/laptops/48942/hp-probook-4510s-review Thanks to its glossy, piano-black lid and square edges, the ProBook 4510s looks both smart and businesslike. HP has also opted to preinstall Vista Business, which means you can upgrade to Windows 7 Professional, the middle version of Microsoft's new... Decent looks and lots of power are let down only by the low-res screen, but this is still well worth a look. ... https://www.expertreviews.co.uk/laptops/48942/hp-probook-4510s-review HPs 4510s is the only laptop with Vista Business in this category, but thats no reason to avoid it if youre choosing a laptop for home use. The ProBook came second in this groups 2D benchmark results and, thanks to a Radeon HD 4330 graphics chip...