One device. All the range, environmental, and ballistic data you need to make the shot of a lifetime, every time. For precision shooters and open-country hunters, the Razor^® HD 4000 GB eliminates the guesswork from longer shots—delivering critical data for first-shot accuracy at the push of a button. Designed for rugged reliability, it’s ready to deliver hair-splitting confidence whether you’re targeting a trophy above the treeline, across an open prairie, or ringing steel out to 4000 yards.