Great little step up (off the 5V rail) to power 12V equipment, such as FPV cameras or transmitters. Can also step up 1S or 2S lipos.
Note that the current drawn from the lower voltage is higher (same power). For example, 200mA@12V is 480mA@5V. Check that your 5V regulator can output enough current to power your 12V electronics as well as the 5V equipment.