Nikon Prostaff 1000i Laser Rangefinder, 1000 Yards, Black - 16663 Nikon’s advanced ID Incline/Decline Technology provides the horizontal distance to the target, even when ranging at various incline or decline shooting angles up to an incredible +/- 89 degrees nearly vertical up or down. PROSTAFF 1000i allows user to switch between horizontal distance or actual distance modes Please know that some images are factory images (for new items) and may not display the EXACT model listed.