The Sierra3 BDX 2 riflescope provides the hunter an illuminated auto-holdover dot on targets when coupled with a BDX capable KILO rangefinder. Automatic holdover dot on a Digital Focal Plane, combining Second Focal Plane stadia's, with an OLED illuminated ballistic holdover dot that automatically scales with zoom to subtend on target at any magnification level. Featuring exceptional SpectraCoat lenses, LevelPlex digital anti-cant and KinETHIC kinetic energy transfer indicator. Integrated BDX Ballistic Data Xchange. A rangefinder and riflescope system that uses ballistics, environmental conditions and Bluetooth to illuminate the exact holdover dot. Download the free BDX App for iOS or Android to setup ballistic profiles.