USB 3.0 A to Micro B 3.0 Retractable Cable 1.5M (4.9ft) 5Gbps. (This cable can not be used with smart phones or PDA devices. USB 3.0 Micro B connector is designed to carry data and power in USB 3.0 SuperSpeed applications.) SuperSpeed USB 3.0 supporting 5 Gbps data rate over ten times of USB 2.0 performance Backward compatible with USB 2.0 and 1.1 For connecting computer or notebok to Blue-ray, External hard drive, and other Foil and Braided shielding complies fully with the rated cable specifications. This has a twisted pair construction to minimize cross talk, and produce super high speed with error-free transmission.