The Super Speed USB 3.0 interface offers a maximum transfer rate of 5 gigabits per second (Gbps) compared to the 480 megabits per second (Mbps) of USB 2.0. In addition, the 5400RPM rotation speed delivers high performance, while the low vibration Dynamic Balancing technology and the low noise technologies SilentSeek and NoiseGuard provide added convenience. In addition, the on-board USB technology reduces the size of the hard disk casing and delivers reduced power consumption. Total Price Rs. 7500/- Product Description 640GB External Hard Drive 7200RPM 8MB-2.5 USB3.0 Piano Black 3-Year - USB 3.0 SUPERSPEED Type Hard drive - external Dimensions (WxDxH) 8.2 cm x 11.1 cm x 1.8 cm Weight 165 g Enclosure Colour Piano Black Capacity 640 GB Buffer 8 MB Hot Swappable Yes Rotational Speed 7200 rpm USB 3.0 ports quantity 1 Compatible operating systems Windows Vista, Windows XP Home / Professional Edition, Windows 2000 Pro, Mac OS x 10.4.8 Hard disk interface USB 3.0