When speed is paramount theres no substitute for a range-finding binocular. The BX-4 Range HD TBRw/10x42mm fuses our DNA engine and ballistics software with the optical performance diehard hunters and shooters demand. Offers excellent dawn-to-dusk light transmission for a bright image when it matters most elite-level glare reduction in harsh light. Tripod Compatible (1/4-20). Leupolds True Ballistic Range/Wind (TBR/W) technology takes precision to the next level by offering 25 selectable ballistics groups that account for your preferred cartridge helping you dial in the exact range of your target.