The XL Series laser rangefinders measure line-of-sight distance using an eye-safe laser and precision electronics. Look through the viewfinder, push the button, place the red dot on an object and release the button to fire the laser. Instantly, the measurement appears in the easy-to-read external LCD display. Lightweight, at 11 ounces, these high-quality laser rangefinders offer one-button operation for unparalleled ease of use.