The Sig Sauer 4K features fast laser repeating capabilities. It has bluetooth features that allow it to communicate with your rifle scope, and SIG's are well known for their reputation and capabilities - they've been field tested and proven.The Sig Sauer 4K Kilo BDX Rangefinder comes equipped with a Gen II lightwave DSP ranging engine. It is one of the most advanced in its class. Optical Image Stabilization offers a crisp, clear image free from any shake or vibration. Applied Ballistics Ultralite can be configured to your exact rifle and ammo, and it comes complete with a database of 25 bullet profiles and 8 ballistic groups. Plus, onboard temperature, pressure, and humidity sensors provide accurate, real-time ballistic calculations. 5 target modes include first, best, last, fog, and extended range, and 5 range modes include BDX-U, BDX-X, AMR, LOS, and archery. 4X scan mode offers superfast ranging at distance. BDX 2.0 enabled for BluetoothA(R) communication with other BDX-enabled sights and devices. IPX7-rated waterproof design ensures the unit can stand up to use in the field. Also equipped with an integrated tripod mount. Powered by a CR123 lithium battery (included).Gen II lightwave DSP ranging engineOptical Image Stabilization delivers a crisp image free from shake or vibrationApplied Ballistics Ultralite offers 25 bullet profiles and 8 ballistic groupsEnvironmental sensors provide accurate, real-time ballistic calculations5 target modes - first, best, last, fog, and extended range5 range modes - BDX-U, BDX-X, AMR, LOS, and archery4X scan mode for superfast ranging at a distanceBDX 2.0 enabled for Bluetooth communicationIPX7-rated waterproof designIntegrated tripod mountIncludes CR123 battery