The BDX rangefinder and riflescope system is simple, fast, and intuitive. The Kilo rangefinder features a Lightwave DSP digital rangefinder engine, Hyperscan with four (4) times per second scan rate, RangeLock and the Lumatic auto-adjusting display. The Sierra3BDX riflescope utilizes HD glass for superior resolution and optical clarity, a 30mm tube and LevelPlex digital anti-cant system. The BDX-R1 Digital Ballistic Reticle is the evolution of holdover, providing a ballistic solution out to 800 yards with 1 MOA of accuracy. Download the SIG BDX app for Android or iOS smartphones, pair the Kilo BDX rangefinder and Sierra3BDX riflescope, set up a basic ballistic profile, and you're ready to shoot or hunt. Once you are in the field, range your target, and the KILO BDX rangefinder will utilize onboard Applied Ballistics Ultralight to instantly send your dope to the scope via Bluetooth. Using your basic ballistic profile, the ballistic solution is calculated for your target and will instantly illuminate on the BDX-R1 Digital Ballistic Reticle with windage and elevation holds in the Sierra3BDX riflescope. A blue LED on the riflescope power selector indicates that the BDX system is paired, and when the reticle has received new ballistic holdover and windage data from the rangefinder. This BDX Combo Kit includes a Kilo1800BDX 6x 22mm and a Sierra3 4.5-14x44mm with BDX-R1 Digital reticle.