ITEM NAME:USB DC 5V To DC 9V Step-Up Module Converter Cable 2.1x5.5mm Male Connector ME Description: Input Voltage: DC 5V Output Voltage: DC 9V Max Input Current: 2.1A Max Output Current: 800mA (For 800mA or less application is recommended) Cable Length: approx 1M/3Ft Color: black, as picture shows Input Interface: USB A Type Male Output Interface: 2.1x5.5mm Plug 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 Package included: 1 x Step-Up cable.Input Interface: USB A Type Male. Output Interface: 2.1x5.5mm Plug.