Depress and hold both the Power and Mode buttons at the tail cap, and at the same time swiftly loosen and tighten the light body, with the light flash once to enter Tactical mode-switching; twice to enter Outdoor and three times to activate Daily mode-switching.
Tactical Mode-switching: with the light turned off, slightly-depress the Mode button to activate Strobe and release to turn it off. Slightly-depress the Power button to turn on the light and it comes at High mode, another slight-depress will turn off the light. With the light turned on, slightly-depress the mode button to choose from High and Strobe, release to choose either mode. The light always comes at High mode when turning on.
Outdoor Mode-switching: with the light turned off, slightly-depress the Mode button to activate Strobe, release to turn it off. Slightly-depress the Power button to turn on the light at High, another press to turn it off. When the light is turned on, slightly-depress the Mode button to choose from High and Low, depress-and-hold the Mode button to enter Strobe, if slightly-depress the Mode button again, the light will resume the mode used before turning on the Strobe. The light always comes at High mode when turning on.
Daily Mode-switching: with the light turned off, slightly-depress the Mode button to activate Strobe and release to turn it off. Slightly-depress the Power button to turn on the light and another depress to turn it off. With the light turned on, slightly-depress the Mode button to choose from Low, Mid, High outputs. Depress-and-hold the mode button to activate Strobe. This light has memory function under Daily system, it always come at the most recent mode used before turned off.