Integrated BDX Ballistic Data Xchange. A Rangefinder and Riflescope System That Uses Ballistics, Environmental Conditions and Bluetooth to Illuminate the Exact Holdover Dot Based on Target Distance ' BDX 2.0 and Onboard, User Configurable, SmartBDC with 9 Ballistic Groups ' Automatic Holdover Dot displayed on a Digital Focal Plane ' BDX-R2 reticle with 194 individually addressable, LED, hold points ' Advanced Bluetooth with up to 30 yards of connectivity to KILOBDX Laser Rangefinders and other devices ' Up to 95% light transmission. Mfg: Sig Sauer, Inc.