Features Designed with switch, you can choose the output 9v or 12v through it, and the LED display would tell the output voltage value. It 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. Can be used to power the router via power bank if power down. You can still enjoy the WIFI during power cuts. Made of high quality electronic component, durable to use. Features:1. Made of high quality electronic component, durable to use.2. Designed with switch, you can choose the output 9v or 12v through it, and the LED display would tell the output voltage value.3. Can be used to power the router via power bank if power down.4. You can still enjoy the WIFI during power cuts.5. It 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. Specification:Condition: 100% Brand NewModel: KWS-912VInput Voltage: 5VOutput Voltage: 9V/12VOutput Current: 1A(9V)                          0.8A(12V)Weight: Approx. 35g / 1.2ozCable Length: Approx. 0.72m / 2.36ft Package List:1 * USB Step-up Converter Cable Package List