The rangefinder provides accurate readings up to 850 yards on reflective targets and 400 yards on non-reflective targets, using infrared energy pulses for precision within +/- 1 yard. The binoculars feature an all-glass, fully multi-coated optical system with BAK-7 prisms, delivering crisp resolution, high contrast, and exceptional light transmission. With a rugged rubber armor housing and IPX7 waterproof and fogproof construction, this combo ensures reliable performance in any weather conditions.