5" overall. Aircraft grade aluminum body with anodized finish. Stainless pocket clip with polished finish. Twist the head to turn on, turn off, and focus the beam. Water resistant up to 1m. Ultra Bright, latest generation, white LED with up to 84 lumen output. Visible up to 116m. Requires two AAA batteries (included). Up to 5 hours, 45 minute run time per battery set. Hardshell gift box.