There are times you may have an external device, such as a portable 2.5" hard drive, & a standard USB (Universal Serial Bus) cable is not able to transfer enough power to operate the device. This problem can be easily solved by using the USB (Universal Serial Bus) 2.0 "Y" Cables. The cable features a red molded hood for the auxiliary USB (Universal Serial Bus) A connector, allowing the user to easily distinguish between main & auxiliary power. Foil & braid shielding reduces EMI/RFI interference & a twisted-pair construction helps reduce crosstalk, ensuring high-speed, error-free data transfer. This cable is compatible with USB (Universal Serial Bus) 1.0, 1.1, & 2.0 specifications.