FOURSEVENS Mini AA M2A Black Finish / Cool White LED; 2XAA; 180 Lumens Brightness Levels: Low: 3.0 lumens, 3.4 days/Medium: 36 lumens, 8.8 hrs/High: 180 lumens, 1.7 hrs Special Modes: Strobe: 3.3 hrs/SOS:10 hrs/Beacon Hi: 17 hrs/Beacon Lo: 88 hrs Included accessories: Batteries, lanyard, spare o-ring Lens Material: Optical-grade glass lens with antireflective coating on both sides Body Material: Type-III hard-anodized aircraft-grade aluminum