The Fenix LD10 is digitally regulated and digitally controlled. It has two output modes which produce a total of six levels of output. These modes not only allow the user to select the best compromise between brightness and runtime for any given task, but they also help to aid in an emergency. The LD10 does all this and still retains a very compact size. If you're looking for solid reliability, digitally-regulated brightness, and compact size, this Fenix is for you. Now with a removable pocket clip.