Safe and Reliable: our voltage adapter provides your devices reliable protection from over-current, over voltage, overload or short circuit. Switch and LED display: our step-up regulator is designed with switch, you can choose the output 9V or 12V through it, and the LED display would tell the output voltage. USB step up converter: input voltage is DC 5V, output voltage is DC 9V or 12V, max output current is 1A (9V), 0.8A (12V). Application: the USB to 9V cable can be applied 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, solar panel, USB power pack, power adapter, etc. Convenient use: plug and play, you can still enjoy the WIFI during power cuts; Design with small dimension, is very convenient to carry out. Colour: black Material: PVC Size: Length: about 0.6m Package Contents: 2 * USB Step-up Converters 2 * Connectors in 3.5 x 1.35 mm 2 * Connectors in 5.5 x 2.1 mm Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.