The ProTac 2L-X is a compact, ultra-bright flashlight that is ideal for your everyday carry setup. It produces 500 lumens and provides you with dual fuel versatility, as it accepts either one Streamlight rechargeable 18650 battery or two CR123A lithium batteries. TEN-TAPA(R) Programming - Choose from three user selectable programs: 1.) high/strobe/low; 2.) high only; 3.) low/high C4A(R) LED illumination output and run times: High for maximum illumination: 500 lumens; 6,800 candela; 165m beam; runs 2.75 hours (CR123A batteries); runs 3.25 hours (18650 battery) Low for extended run time: 40 lumens; 600 candela; 49m beam; runs 30 hours (either battery type) Strobe for signaling or disorienting: runs 3.25-4.5 hours Solid State power regulation provides maximum light output throughout battery life Dual fuel - uses two CR123A lithium batteries (included); also accepts one Streamlight rechargeable 18650 lithium battery Durable, anodized aluminum construction; removable pocket clip IPX7 waterproof to 1m for 30 minutes, 2m impact resistance tested Anti-roll head Includes two CR123A lithium batteries and nylon holster 5.14" (13.0 cm); 3.9 oz (111g) with CR123 batteries; 4.4 oz (125g) with 18650 rechargeable battery RoHS compliant Limited Lifetime Warranty