Sig Sauer BDX is the newest in electro-optics technology. BDX or Ballistic Data Xchange technology is found in the new Sierra3BDX riflescopes and KiloBDX rangefinders. To get the most out of your BDX products you can also download the SIG SAUER BDX app on Android and Apple devices and receive information via Bluetooth. The BDX allows for both accuracy and simplicity. DownloadsSIG Sauer KILO1800BDX 6x22mm Product ManualDownloadSig Sauer Product Catalog 2020Download SIG Sauer Kilo1800BDX Laser Range Finding Monocular 6x22mm Black, Class 3R SOK18601