OPEBS Fenix L0D 5 Level High Performance Cree LED Flashlight 3 inch length, less than one ounce weight, AMAZING 5 OUTPUT LEVELS: 30 Lumens (3.5hrs) -&gt; 11 Lumens (8.5hrs) -&gt; 75 Lumens (1hrs) -&gt;Strobe -&gt; SOS Uses one 1.5V AAA ( Alkaline, Ni-MH, Lithium ) battery, inexpensive and widely available--NOT INCLUDED Unbelievable 1 ounce body design is made of durable aircraft-grade aluminum, Type III hard-anodized anti-abrasive finish Water-resistant (dunkable) Virtually indestructible, microprocessor-controlled, CREE light emitting diode (LED) has no filament to burn out or break