High quality copper! Do not take other home copper clad aluminum, cut the price of cutting costs than to! We provide quality! Is reliable! The

Conversion cable DC to USB DC female 5.5 * 2.1mm USB female USB charging cable

DC head is 5.5 * 2.1mm female, USB female all-inclusive edge

Length of about 12cm (including head)

The standard inside and outside the negative: the mother of the core is the positive, the shell metal ring is negative