<p>The SIG SAUER® SIERRA3™ BDX™ Rifle Scope utilizes Ballistic Data Xchange (BDX) and Bluetooth® to provide an illuminated holdover dot on targets at long range, when coupled with a BDX capable KILO rangefinder. The second focal plane reticle combines with digital focal plane OLED illuminated ballistic holdover dots. MOTAC™ (Motion Activated Illumination) automatically powers up the illumination when the scope-mounted weapon is picked up or moves, and powers down to save battery life when the weapon remains idle. LevelPlex® Digital Anti-Cant System gets your weapon squared with no cant (+/- 0.5°) so that compensations stay true. The innovative KinETHIC kinetic energy transfer indicator aids in ethical shooting by indicating when the bullet's energy on target drops below a threshold that can be set by the hunter using the SIG BDX App. The scope is powered by 1 CR2032 battery (included). Premium glass with SPECTRACOAT™ anti-reflection lens coatings provide optimum clarity. The SIG SAUER SIERRA3 BDX Rifle Scope has an IPX-7 waterproof rating.</p> <ul> <li>Utilizes Ballistic Data Xchange and Bluetooth</li> <li>Pairs with BDX capable KILO rangefinder</li> <li>Illuminates holdover dot on target</li> <li>LevelPlex Digital Anti-Cant System</li> <li>Kinetic energy transfer indicator</li> <li>Motion Activated Illumination</li> <li>Anti-reflection lens coatings</li> <li>IPX-7 waterproof</li> </ul>