Description: Features:<... Cree XM-L (U2) LED with a lifespan of 50,000 hoursUses four 1.5V AA (Ni-MH, Alkaline ) batteries175mm(Length) x40mm(Diameter)180-gram weight (excluding batteries)Digitally regulated output maintains constant brightnessReverse polarity protection guards against improper battery installationLow-voltage reminder indicates when battery replacement is neededAnti-roll, slip-resistant body designTactical tail cap switch with momentary-on functionTail mode switch