Usb Power Boost Dc 5v to Dc 9v

1.With this cable, you can connect your power bank to router. Thus, when power cut, you can use your power bank to supply your router 2. Use this cable, you can supply your car Air Purifier by power bank USB cable USB to DC ( 5.5mm /4.0mm / 3.5mm ) charging cable power supply cable hole 5V/9V/12V boost lines USB cable [Introduction]: by charging treasure to power other devices. Such as: routers, USB lights, USB fan, radiator, 5V mini speakers, and so on . DC power plug size: diameter: 5.5mm, inner diameter: 2.1mm; positive with 1 meter cable length [Difference between the three lines] 5V straight through: pure power cord, USB input is 5V, power DC plug output is 5V