TEN-TAP® Programming – Choice of three user selectable programs: 1) high/strobe/low 2) high only 3) low/high LED output and run times: High for bright light: 275 lumens; 143m beam; runs 2 hours; 5,100 candela Low for longer run time: 22 lumens; 41m beam; runs 24 hours; 420 candela Strobe for signaling or disorienting: runs 3.5 hours Includes one 3V CR123A lithium battery and nylon holster IPX7 waterproof to 1 meter for 30 minutes; 2 meter impact resistance tested Solid State power regulation provides maximum light output throughout battery life Rubber push-button tail switch Durable, anodized aluminum construction with impact-resistant tempered glass lens Unbreakable pocket clip Anti-roll head 3.43” (8.71 cm); 2 oz (57 grams) RoHS compliant