The VortexA(R) ImpactA(R) 4000 Ballistic Rail-Mounted Laser Rangefinder is designed to be the perfect all-in-one range and ballistic problem solver for long-range competition shooters and hunters alike. This rail-mounted laser rangefinder boasts integrated GeoBallisticsA(R), an accurate ballistics solver that features a full, up-to-date bullet database, making it perfect for any arsenal. 10 preloaded and customizable ballistics profiles allow users to take advantage of this rangefinder with multiple different rifles. Onboard environmental sensors allow you to quickly read humidity, barometric pressure, and exposed temperature so you can easily stay on top of quickly changing environments while the onboard compass ensures you can always keep track of where you're heading. An easy-to-read wind/drop solutions allows you to easily keep track of how the wind is affecting your shots without having to leave your shooting position. Further, this laser rangefinder can be mounted using the Vortex Precision Diving Board Mounts to any Vortex precision rings, mounts, or other Picatinny rail section for quick and easy mounting while a more rugged design holds zero even under the heaviest of recoil. If that's not enough, this rangefinder is BluetoothA(R) compatible and can connect to the GeoBallistics App and the included Bluetooth remote for quick intuitive field performance. Operates on one CR2032 battery (included) and backed by the Vortex VIP Warranty(TM) lifetime warranty.