Material: 7075 Aluminum Output (Lumens): 850 (high) / 400 (medium) / 5 (low) Runtime (hours): 2.5 (high) / 5 (medium) / 100+ (low) Battery Type: 3xCR123 or RCR123 1) High Impact Hardened Optical Glass Lenses – protects the LED from the toughest of conditions and diligently bends the light much like a magnifying glass to ensure maximum brightness, distance, and efficiency. But don’t let the durability of a glass lens fool you, these lenses have been vigorously tested and designed to withstand excessive abuse while retaining optimal performance. 2) Patented Focusing Aspherical Lens System – This patented technology allows for a significant array of focusing options ranging from a flood to spot beam. This ensures that the perfect focus setting is available whether you are concentrating the light hundreds of yards away, or lighting up an object nearby. 3) 7075 Aluminum Aerospace Grade Alloy Construction– Defends against the harshest conditions imaginable and is shielded by a type III hard-anodized finish, a military grade surface coating available to resists corrosion and improve durability. (Available in either Tan or Black finish). 4) McClicky Momentary Activation On/Off Switch – This reliable easy to use tailcap switch enables the LensLight 3x123’s 2 or 3-stage microprocessor to power the flashlight at either an efficient low setting or high output level for maximum brightness. Simply press down once for low setting, press again for high setting, or simply press all the way down for constant-on. 5) Light Emitting Diode –A premium exclusive high-tech, high-efficiency LED is used to emit astonishing power that is untouchable by any other light. This everlasting LED is sure to exert enough luminosity to stop any and everything in its track. Now that’s what you call an LED! 6) Premium Grade O-Rings- LensLight 3x123 contains 6 strategically placed O-rings throughout the flashlight to seal and protect the lights internals from dust, moisture, and any other micro-substance that it may come in contact with. This ensures that the LensLight performs at maximum efficiency at all times and your investment last a lifetime. 7) 3X CR123 Batteries – powered using three CR123 or RCR123 batteries. 8) Titanium Pocket Clip (3) CR123 or RCR123 Batteries Patented Focusable Aspheric Lens System TypeIII hard anodize 7075 Aluminum High Tolerance American CNC Machining Double Lens - high impact hardened glass Chem-Kote Contacts and Heat sink Aerospace Grade Thermal Potting and Flow Management Temperature regulation Weather Proof/Water Resistant Premium Bin High CRI CREE XML-2 LED Fully Regulated Light Engine New condition, Includes 2 spare O Rings and papers. Has some scuffs and scratches. Has been used, good condition otherwise.