CY USB 2.0 Female A to Dual A Male Extra Power Data Y Cable for 2.5" Hard Disk Two USB male connector,One is for USB power and data, another one for USB power only Does one USB port not supply enough power for your USB device? Our cable allows for power to be taken from 2 USB ports, like a PC and External hard drive. Allows you to link 1 USB device into 2 USB Ports on your PC for more power.