Features: USB booster input is DC5V, output is DC9V or 12V, output current is 1A9V, 0.8A 12V This regulator is with switching, you can choose the output 9v or 12v through it, and the LED display would tell the output value.. The converter can be used to power the routers power adapters if powering down. You can still enjoy the wifi during power cuttings. It can also to other devices which is 5v power supply, such as small fan, desk lamp, solar panel, USB power adapter.