Professional divers know conventional torches dont allow good vision when under water reflection rules out long ranges led lenser have developed a torch that due to its axial collimator attains a strength of focus that up to now has been considered impossible the head of the torch consist of high grade steel the body of shock proof synthetic material it is operated by 4 x aa alkaline batteries which provide more than 50 hours of light the led light chip lasts up to 100000 hours product details