USB Cable to DC 5.5×2.1mm Power jack

From the shop's description

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.) Cable uses the 5V DC from the USB port. Length: 80cm. Power devices from a USB port For small electronics and devices which use a 5.5mm barrel jack for a power cable Provides 5V DC from USB Cable length: 80cm Type A Male USB plug to 5.5mm(outer), 2.1mm (inner) male coaxial/barrel plug with positive center pin. 1 x 5V USB Charger power Cable