Specifications: Led Type: Cree XM-L LED Max Lifespan: 50000 Hours Max Output: 820 Lumens Max Runtime: 170 Hours Adjusting Level: 6 Levels Switch Type: Push-button tail cap Battery Type: 4 CR123 or 2 18650 Operation Mode: GeneralTurboStrobeSOSFeatures: Digitally regulated output - maintains constant brightnessMade of durable aircraft-grade aluminumPremium Type III hard-anodized anti-abrasive finishWaterproof to IPX-8 StandardAnti-roll slip-resistant body designCapable of standing up securely on a flat surface to serve as a candleToughened ultra-clear glass lens with anti-reflective coatingIn the box: HolsterLanyardSpare O-RingsDimensions:Length: 6.3 " / 16 cm Diameter: 1.9 " / 4.83 cm Weight: 9.1 oz / 257.98 g Notice: The above parameters are approximate and may vary between flashlights batteries and environments. Battery Not Included