Turn on the light by press and release the on/off button switch (<0.4s). To turn off the light, press and release the switch again.
For momentary on, press and hold the button switch for immediate output.
Twist the head to select between four output levels. You can pre-select the desired output level before turning on the flashlight.
Instant Turbo output - at any output level, press and hold the flashlight for 100% output. Release the button to return to previous level.
Instant Strobe output - at any output level (or off), double press and hold the on/off button switch for strobe output. Release the button to return to previous level (or off).
To access auxiliary levels, starting at head tight position (1st level), loosen to 3rd (or 4th level) and tighten the head within one second to enter auxiliary setting. Repeat to cycle through all settings. Turn off the light or loosen the head to quit.
Advance (Programmable Features) To switch between tactical and regular mode, turn on the flashlight at 1st level, dial to 2nd level and then back to 1st level for five times within five seconds.
High voltage mode - For optimal circuitry temperature operating at higher voltage, when initial startup voltage exceeds 18V, the maximum output will be reduced by 15%.
LED voltage indicator
4 x 18650 mode
(Red flashing) Low than 12.4V
(Red) Between 12.4 and 14V
(Blue) Higher than 14V
8 x CR123A mode
(Red flashing) Low than 13.5V
(Red) Between 13.5 and 16.5V
(Blue) Higher than 16.5V
LED direct soldering on copper for maximum heatsink ability