The Fenix LD10 LED flashlight 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 and uses a commonly found AA battery. If you"re looking for solid reliability, digitally-regulated brightness, and compact size, this Fenix is for you. ◎ Cree XP-G LED (R4) with lifespan of 50,000 hours ◎ Two modes (6 types) of output, generation/turbo selected by turning the bezel (patented) -General Mode: 9 lumens (34hrs) -> 50 lumens (6hrs) -> 105 lumens (2.2hrs) -> SOS -Turbo Mode: 132 lumens (1.5hrs) -> Strobe ◎ Digitally regulated output - maintains constant brightness ◎ Uses one 1.5V AA ( Ni-MH, Alkaline ) batteries, inexpensive and widely available ◎ 100mm (Length) x 21.5mm (Diameter) ◎ Made of durable aircraft-grade aluminum ◎ Premium Type III hard-anodized anti-abrasive finish ◎ 54-gram weight (excluding batteries) ◎ Waterproof to IPX-8 Standard ◎ Toughened ultra-clear glass lens with anti-reflective coating ◎ Push-button tail cap switch ◎ Capable of standing up securely on a flat surface to serve as a candle ◎ Anti-roll, slip-resistant body design ◎ Included accessories: holster, lanyard, body clip, two spare o-rings, and a rubber switch boot