500 lumens and 165 meter beam on High High for maximum illumination: 500 lumens; 165m beam; runs 3.25 hours; multi-function, push-button tactical tail switch allows one-handed operation of momentary, variable intensity, or strobe mode Streamlight's TEN-TAP Programming; three user selectable programs; 1) high/strobe/low; 2) high only; 3) low/high Durable, anodized aluminum construction; includes removable pocket clip and nylon holster Anti-roll head prevents it from rolling away when you set it down