USB STEP UP BOOST CONVERTER INPUT VOLTAGE: DC 5V, output voltage: DC 12V / 9V, max output current: 1.5A (12V), 2A (9V). APPLICATION: The usb to DC 12V / 9V cable can be used to power the router via power bank if power down. In addition, can also be applied to other device which is 5V power supply, such as small fan, desk lamp, USB power pack, power adapter, speakers SWITCH & LED DISPLAY: Our stepup regulator is designed with switch, you can choose the output DC 12V or 9V through it, and the LED display would tell the output voltage value. CONVENIENT USE: Plug and play, you can still enjoy the WIFI during power cuts Design with small dimension, is very convenient to carry out. PACKAGE INCLUDING: 1 x 5V to 9V 12V USB converter 1 x 3.5 X 1.35 mm DC connector.