Specifications: Power Source: 1 x 21700, 1 x 18650, 2 x CR123As, 2 x RCR123As, or 2 x 16340s LED: 4 x CREE XP-G3 S3 Output / Runtime / Throw: Turbo: 2,700 lumens / 45 minutes* / 134 meters High: 800 lumens / 3 hours / 73 meters Medium: 270 lumens / 8 hours 15 minutes / 40 meters Low: 40 lumens / 52 hours / 14 meters Ultra-Low: 1 lumen / 1,200 hours / 3 meters Strobe: 2,700 lumens Beacon: 2,700 lumens SOS: 2,700 lumens * Turbo availability: the turbo level is only accessible when using a 21700/18650 rechargeable Li-ion battery with an output over 8A. It is inaccessible when using CR123A/RCR123A/16340 batteries Peak Beam Intensity: 4,500cd Impact Resistance: 1 meter IP-Rating: IP68 (2 meters submersible) Dimensions: Length: 5.05" (128.2mm) Head Dimensions: 1.14" x 1.25" (28.85mm x 31.77mm) Tube Diameter: 1.02" (26mm) Tail Diameter: 1.11" (28.3mm) Weight: 4.89oz (138.5g) (Bracket and Headband Included, Battery Not Included) Package includes: Nitecore HC35 * 1  ,Spare O-ring* 1,  Clip *1 , Headband *1 ,  Bracket *1 , NITECORE NL2140HP 4000mAh battery *1 18650/CR123 Battery Magazine *1 , USB Charging Cable *1 ,  Lanyard *1, User manual *1