TEN-TAP® Programming – Choice of three user selectable programs: 1) high/strobe/low 2) high only 3) low/high 3 light output levels: High for maximum illumination: 750 lumens; 270m beam; runs 1.25 hours Low for a less intense beam and longer run time: 35 lumens; 60m beam; runs 18 hours Strobe for disorienting or signaling: runs 2.5 hours Multi-function, push-button tail switch for one-handed operation Optimized electronics provide regulated intensity Durable anodized machined aircraft aluminum construction; O-ring sealed glass lens Anti-roll head prevents the light from rolling away when you set it down Removable pocket clip IPX7 waterproof to 1m for 30 minutes 1 meter impact resistance tested Includes two 3V CR123A lithium batteries and nylon holster 5.40" (13.7 cm); 5.6 oz. (159g) with batteries Limited lifetime warranty RoHS compliant