Leupold's Elite Optical System offers excellent dawn-to-dusk light transmission for a bright image when it matters most; True Ballistic Range/ Wind technology provides ballistically calculated ranges for extremely accurate shots; With its TRIG function, Bow Mode is an excellent "set it and forget it" feature that is simple to use; Last Target guarantees that the rangefinder identifies the most distant target along the laser's trajectory; Line of Sight calculates the distance to a target in a straight line, regardless of any incline or decline; Form-Fit eyecups come in three different sizes, allowing you to customize your viewing experience based on your preferences; Archer's Advantage mode uses your arrow weight, velocity, and peep height to deliver precise range calculations made for shooting at steep angles or over long distances; Easily locate the buttons with easy-grip standoffs, even through thick gloves