1.Power devices from a USB port

2.For small electronics and devices which use a
5.5mm barrel jack for a power cable

3.Provides 5V DC from USB

4.Type A Male USB plug to
5.5mm(outer),
2.5mm (inner) male coaxial/barrel plug with positive center pin.

1.Adapt your USB port with this cable so you can power small devices and electronics that use a DC barrel plug with
5.5mm outer diameter and
2.1mm inner. (Consult your device's manual or manufacturer for this info.)

2.Cable uses the 5V DC from the USB port.