RovyVon GL1 3200 Lumens Rotary Tactical Flashlight (Black)

Dial switch
Lock: Rotate it to the far left
Unlock: Rotate it to the off position
Turn on: Rotate it to the right to turn on and change modes in order by Eco-Low-Med-High
Turn off: Rotate it back to the off position.

Tail switch
A. When locked
1. Half press to turn on the momentary High mode, release to turn off, or it will turn off automatically after 3 seconds.
2. Full press to turn on the strobe mode for 3 seconds, then turn off automatically.

B. When the light is off
1. Half-press for momentary on (high mode), release to turn off
2. Half-press for more than 0.5 seconds, then full-press for constant turbo mode.
3. Fast full-press in 0.5 seconds for constant strobe mode.

C. When the mechanical switch turns on the light
Either half-press or full-press, it will go into momentary strobe mode, release to go back to the mode before it went into strobe mode.