Shoot farther, faster, and more precise. For long-range competitors and open-country hunters, the Impact(R) 4000 is the all-in-one range and ballistic problem solver that delivers point-and-shoot solutions without coming off the gun. Features: 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(R) Solver: Equipped with the accurate GeoBallistics(R) 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(TM): Seemlessly connect to the GeoBallistics(R) App for quick customization and to the included Bluetooth(R) Remote for easy adjustments without leaving the shooting position. Pairs with Third-Party Devices: Connects via the GeoBallistics(R) App with popular weather devices or local weather stations.