Brightness and strobe setting:
When switched on, lightly press tail cap button and release (Note: not a full click), it then enters the brightness setting mode. Lightly click the button each time the light will go through high mode, mid mode, low mode and strobe. In a mode for longer than 5 seconds, the PA01 built-in microcomputer automatically memorizes that mode as the preferred setting for the use. Click the light OFF. When switching the light on again, it will automatically enter that memorized mode for the user.