Features: Two groups (1 & 2) output, selected by twisting head/bezel Three levels brightness and seven hidden modes (strobe, beacon, SOS, flash, etc.) at group 1 (head loosen) Turbo output and tactical strobe output at group 2 (head tighten) Stainless steel bezel coated wit durable titanium in dark grey Type III finish/aerospace grade aluminum Light orange peel (LOP) reflector for maximum output and a smooth beam Superior knurling for improved grip Heavy Duty Holster with self retention device Mil-Spec Paracord Lanyard w/quick attachment clip Operations: Press the rear button switch until it clicks to turn on the flashlight. To switch off the light, press the switch again until it clicks. Switching between group output: With the flashlight on, tighten the head to access group 2 output. Loosen the head to access group 1 output. Switching between modes: With the flashlight on, slightly press the switch and release (within 1.5s) to switch to the next output. Programmable Features Moonlight output - dim or increase the entire output range of the group 1 output. Toggle this setting starting with the head loose, turn on the light and then repeat tighten and loosen three times. Mode memory - remembers the last output in group 1. To toggle this setting, with head tight, turn the light on and repeat loosen and tighten three times. (D25A2 clicky and C clicky only).