Specification: about 50-80CM full length copper (copper conductivity, easily oxidized) 

[Interface]: USB transfer DC5.5 * 2.1MM. Positive with 

[Introduction]: through a computer USB socket to power other devices. Such as: USB light, USB fan, cartoon watches, radiator, 5V mini speakers, USB HUB, etc. ... 

Instructions for use: to convert the DC power plug into the USB port, the output voltage is 5V USB port voltage. DC5.5 * 2.1mm DC power plug is very common, with these lines do not need to use battery-powered, plug directly into the USB port can be used in 

Note: [OD] for the wire diameter, for example: OD3.5 said wire diameter of 3.5mm thickness