Specification : USB Data Transfer Rate: Full speed / 12 Mbps. 3.5 inch 720KB / 1.44MB FDD. Rotation speed: 300 rpm, 360 rpm recording method: MFM. Available USB bus supply current: 500 mA or less. Size: 11.7(L) x 10.6(W) x 1.9(H)cm. Weight: 275g. Data Transfer Rate: 250 Kbits (720KB) / 500 Kbits (1.44MB). Date capacity: 720KB / 1.44MB (Formatted). Number of Cylinders: 80. Acerage Latency Time: 100 MSEC (1.44MB mode) 83.3 MSEC (720KB mode). Operating systems supported: Windows 98/SE/2000/ME/XP/VISTA/7/8/ 10. Media: High Density (2 HD) or Normal Density (2 DD). Cable Length: about 40cm.