The output voltage can be adjusted to 5V, 8V, 9V, or 12V, with the default setting being 12V. The input voltage must be between 2.5V and 5V and should always be lower than the selected output voltage. The output capacity varies: at 5V it can provide 1A, at 8V it offers 0.5A, at 9V it supplies 0.45A, and at 12V it delivers 0.3A when powered by a 3.7V lithium battery. When using a 5V input, it can output 8V at 0.7A, 9V at 0.7A, and 12V at 0.5A. The default output of 12V has an LED indicator that uses approximately 1mA.
The voltage configuration is indicated on the front of the PCB with the letters A and B. You can adjust the output voltage by modifying the pads adjacent to these letters with a soldering iron; a value of 0 in the table indicates that the pads are not connected, while a value of 1 indicates that they are soldered together. Additionally, the pad next to the LED indicator can be disconnected to disable the indicator.