Specification: 3.5 inch 1.44MB FDD. Available USB bus supply current: 500 mA or less. Date capacity: 1.44MB (Formatted). USB Data Transfer Rate: Full speed / 12 Mbps. Data Transfer Rate: 500 Kbits (1.44MB). Number of Cylinders: 80. Rotation speed: 300 rpm, 360 rpm recording method: MFM. Media: High Density (2 HD) or Normal Density (2 DD). Average Latency Time: 100 MSEC (1.44MB mode) Operating systems supported: Windows 98/SE/2000/ME/XP/VISTA/Windows 7. Cable Length: about 40cm. Size: 11.7(L) x 10.6(W) x 1.9(H)cm. Weight: 350g. Package content : 1 x External USB Floppy Disk Drive(No Floppy Disk Disc included, only for illustration.)