Vortex Razor HD 4000 Laser Rangefinder - New for 2019 - The Razor HD 4000 is the essential companion for the extreme hunter, archer and shooter. The extremely effective angle compensated laser rangefinder features four targeting modes (Normal Mode, First Mode, Last Mode and Extended Laser Range Mode) for any ranging environment. The primary HCD (Horizontal Component Distance) range mode provides key angle compensated range information required by the vast majority of shooters in a simple, quick to read display. The Razor HD 4000 also has a LOS (Line of Sight) range mode and scan feature. Eye Relief: 16-19mm Max Angle Reading: +/- 70 degrees Angular Field of View: 6.5 degrees Width: 1.34 inches HD Optical System Tripod Adaptable XR Plus Fully Multi-Coated: Ultimate anti-reflective coatings on all air-to-glass surfaces provide maximum light transmission for peak clarity and the pinnacle of low-light performance Waterproof: O-ring seals prevent moisture, dust and debris from penetrating the binocular for reliable performance in all environments Rubber Armor: Provides a secure, non-slip grip, and durable external protection Rugged Design: Built to handle tough situations. Compact and lightweight Diopter: Adjusts for differences in a user's eyes. Located on right eyepiece