Input voltage: DC 5V Output voltage: DC 12V Max input current: 2A Max Output current: 750mA (For 500mA or less application is recommended) Product Application: 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! Use this cable, you can supply your car Air Purifier by power bank USB cable USB to DC5.5 * 2.1mm 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