USB A Male to DC 5.5 x 2.5mm Jack Cable 5V Power Cord Plug Converter Wire Lead
Very useful cable for device needs DC 5V power, just connect the jack end to device, the other USB port connect to USB power. USB 2.0 Type-A male to DC male jack. DC male plug is 5.5mm (outer) x 2.5mm (inner), also fit 2.1mm (inner).