The front part moves back and forth to focus the beam. Good focus.
3 clicks on the switch.
full power, less power, and blinking.
hard click for turn on, half click to change modes.
when turned off for a minute or two the light will always begin at the full power mode.
If turned off and on quickly it will cycle to the next mode.
good battery, though i wish it was not a proprietary one.
good value for the money