Supports USB Type-C PD, and the switching diagram is as follows(The switch is “↓” downward and “↑” upward): ↓↓↓5V; ↑↑↑9V; ↑↑↓12V; ↑↓↓15V; ↑↓↑20V. If your power adapter maximum output is 12V, then the maximum output of this product will be 12V and will not reach 15-20V; 2.