1.The 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.
2.It can be used to power the router via the external battery if it is turned off.
3.You can still enjoy WIFI during power outages.
4.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.
5.Fine workmanship and good performance.
6.Small in size.
7.Plug and play, convenient to use.
8.Easy to use.
9.Durable in use.