KWS-USB Boost Converter DC 5V to 9V/12V Converter Cable

This Step up regulator is designed with a switch, you can choose the 9v or 12v output through it, and the LED display would indicate the value of the output voltage. It can be used to power the router via the external battery if it is turned off. It can also be applied to other devices with a 5v power supply, such as small fan, desk lamp, solar panel, USB power pack, power adapter, etc.