For ODROID-C1+/C2

DC Plug specification : Inner diameter 0.8mm and outer diameter 2.5mm
Cable Length : 800mm approx. (32 inch)

USB host port on your PC or Smartphone chargers can supply the power to ODROID-C1+/C2 via this cable.

Note: Voltage of the USB host device MUST be between 4.75V and 5.25V at 1Amp load. 
Anything outside this range will cause damage to the ODROID and is not covered by your warranty