Vortex Impact 4000 Ballistic Rail-Mounted Laser Rangefinder - Shoot farther, faster, and more precise. For long-range competitors and open-country hunters, the Impact 4000 is the all-in-one range and ballistic problem solver that delivers point-and-shoot solutions without coming off the gun. Picatinny Mount - Mounts to any picatinny-style rail or rings with a diving board mount.; Quick and Reliable Zero - Easy to zero and reliably holds it zero even under heavy recoil.; Convenient Wind/Drop Solutions - Easy to read display of wind/drop solutions and the ability to make adjustments while in the shooting position.; Integrated GeoBallistics Solver - Equipped with the accurate GeoBallistics Solver backed by a full, up-to-date bullet library.; Customize Ballistic Profiles - Customize profiles or use one of the ten preloaded profiles for popular cartridges.; On-Board Environmental Sensors - On-board compass and exposed temperature, pressure, and humidity sensors.; Wind Bearing Capture Mode - Manually enter speed and direction with patented Wind Bearing Capture Mode.; Built-in Range Card Generator - Ability to create and save up to ten range cards with drop and wind corrections.; Connect with Vortex Relay - Seemlessly connect to the GeoBallistics App for quick customization and to the included Bluetooth Remote for easy adjustments without leaving the shooting position.; Pairs with Third-Party Devices - Connects via the GeoBallistics App with popular weather devices or local weather stations. INCLUDED IN THE BOX Bluetooth Remote; Bluetooth Remote Mounting Kit; Easy Zero Tool Kit; SureFit Cover; Lens Cloth; Custom Tools; CR123 Battery; CR2032 Bluetooth Remote Battery;