The Fenix LD20 is a digitally controlled constant current multilevel flashlight Fenix has to offer. It has six levels of output, which not only allows the user to select the best compromise between brightness and runtime for any given task but also has ability to aid in an emergency. The LD20 does all this and still retains a compact size. If you're looking for solid reliability, digitally regulated brightness, and compact size, this Fenix is for you.
Fully press to switch on and turn the bezel to select the General Mode or the Turbo Mode. A soft-press anytime while the light is on will change the brightness levels of a certain mode. Keep the light off for over 2 seconds, the light will turn completely off, and the regulative circuit will be restored.