*  Rugged aerospace-grade aluminum body, available with Type III hardest anodizing in black or Mil-Spec Type III hard anodizing in olive drab;
*  O-ring sealed, waterproof in 1 meters deep water above and weatherproof;                              
*  Toughened ultra clear glass lens ;                       
*  Aluminum reflector for a flawless beam;              
*  Tail cap switch;                                                 
*   Li-ion battery discharge protected ,                      
*  Wrong polarity of battery inset protected;