Nikon Prostaff 7i Laser Range Finder Effective range: 8-1300 yards 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 Single button operation of the PROSTAFF 7i Laser Rangefinder is simple to use and automatically powers down after 8 seconds to reduce battery use The uncluttered screen displays ranges with speed and accuracy in .1-yard intervals out to 1,000 yards, 1-yard increments over 1,000 yards ProStaff 7i is waterproof/fogproof and the battery chamber is water resistant