3-Wire 12V~30V to 5V 2.5A mini USB cable, used to hardwire DVR to vehicle power.

Input DC12V~30V, output 5V2.5A.

Yellow wire positive, black wire negative, while the other wire is Acc.

suitable for installation in car, trucks, ship, etc. to charge various electronic product.

Suitable for charging driving recorder, navigation, global positioning system, mobile phones, tablets, etc. with Mini USB interfaces.