This is a tiny USB-C PD QC4 module that is able to deliver four voltages 9V-12V-15V-20V depending on the module you have purchased. There are two versions of the module. One is the 15V,20V version and you can select the output voltage using a solder jumper and the other is the 9V, 12V and you select the voltage in the same way. The seller notes that the module you purchase may provide a randomly selected voltage and you have to check before powering your device. Also, it doesn’t support charging information negotiation or other voltages and it is not guaranteed to be compatible with all the chargers. In other words, you should use the modules on your own risk and always test it before applying an output voltage on your devices.
The module is sold on www.aliexpress.com for 0.98€ +0.44€ shipping.