Leupold Vendetta 2 Bow-Mounted Laser Range Finder True Ballistic Range (TBR) technology accounts for incline, range to target, and your ballistics information. Powered by the readily available CR2 lithium camera battery, the RX-Rangefinders with DNA feature a convenient battery power indicator With one-touch continuous scan, simply hold the trigger pad down and continuously range an animal as it moves. No need to guess distances or work from pre-ranged markers. You get an accurate range every step of the way Easily sync your Vendetta with your pins with the integrated sighting laser. Zero a target with the pin of your choice, then align the laser dot with the same target. Now youre zeroed and ready to range quickly and accurately The LED Display is specially engineered for excellent visibility under any lighting conditions