BDX Combo Kit, KILO2400 and SIERRA3 6.5-20x52mm Disguised within the form factor of a traditional riflescope lies the power of the Sig Sauer BDX Ballistic Data Xchange. The SIERRA3 BDX riflescope provides the hunter an illuminated auto-holdover dot on targets when coupled with a BDX capable KILO rangefinder. The BDX KILO2400 is more than just a rangefinder, it has an onboard Applied Ballistics calculator that sends dope/holdover information via Bluetooth with the SIERRA3 scope. SIERRA Specifications: Magnification: 6.5-20 Objective Lens Diameter: 52mm Color: Black Reticle: BDX-R1 Digital Adjustment Increments: 0.25 MOA Maintube Diameter: 30mm Kilo2400 Specifications: Magnification: 7 Objective Lens Diameter: 25mm Color: OD Green Range on Deer: Up to 1400 yards Range on Trees: Up to 1800 yards Max Reflective: Up to 3400 yards HyperScan Technology provides 4 range updates per second in scan mode while RangeLock reports the last range result when ranging distant targets Embedded Applied Ballistics Ultralite with bullet database and support for G1/G7 Line of Sight or Angle Modified range in addition to full ballistic holdover and windage results in MIL or MOA BDX Features: Integrated BDX Ballistic Data Xchange. A rangefinder and riflescope system that uses ballistics, enviromental conditions and Bluetooth to illuminate the exact holdover dot. Automatic holdover dot on a Digital Focal Plane, combining Second Focal Plane stadias, with an OLED illuminated ballistic holdover dot that automatically scales with zoom to subtend on target at any magnification level. Features our MOTAC (Motion Activated Illumination) that powers up when it senses motion and powers down when it does not. Provides for optimum operational safety and enhanced battery life. Free downloadable SIG BDX App for your smartphone, iOS and Android are supported