Bullet points:1, Function: the input voltage of the USB amplifier is 5V DC, the output voltage is 9V DC or 12V, the maximum current output is 1A (9V), 0.8A (12V).2, Application: the converter can be used to power the router via the power bank if the power is off. In addition, it can also be applied to other device which is 5v power supply, such as small fan, desk lamp, solar panel, USB power supply, power supply, etc.3, switch and LED display: Step up regulator is designed with switch, you can choose 9v or 12v output through it, and the LED display will tell the output voltage value.4, Convenient use: Plug and play, you can still enjoy WIFI when cutting the power supply; With small dimension, it is very convenient to carry out.5, : With excellent workmanship and good performance, it can be used to power the router through the power bank if the power is off. Specification: Input Voltage: 5V Output Voltage: 9V/12VMax. Output Current: 9V 2A, 12V 1.5aInterface Properties: USB Hole Converted to DC Round HoleCable Length: Approx. 0.8m/ 31.5inTips:1.9V/12V boost USB cable, the power port should not be connected to the USB port on the computer; The output current of the 2.9V/12V boost cable is less than 1A. If your router/light cat current is greater than 1A, it cannot be used. Package List:1 x USB Step Converter 1x3.5*1.35mm1 connector) we accept Alipay, West Union, TT. All major credit cards are accepted through the payment processor's secure escrow.2) payment must be made within 3 days of placing the order.1.