The PROSTAFF 1000i 6x20 Laser Rangefinder features ID (Incline/Decline) Technology-with a Horizontal Distance/Actual Distance display mode that can be easily switched depending upon your preference. With a solid 1,000-yard maximum ranging capability that fi ts into the hand, together with compact ergonomics that fi t your pocket. A 6x optical system makes seeing-and ranging-targets out to 600 yards and beyond a reality, while the Tru-Target system allows you to select either First Target or Distant Target Priority. Weather resistant/rainproof construction. Features 6-1,000 Yard Measurement Range Displays in 1-yard increments Single or continuous measurement (up to 8 seconds) High-quality 6x monocular with multilayer coating for bright, clear images Long Eye Relief - 16.7mm. Perfect for eyeglass wearers ID TECHNOLOGY delivers the one number you need to account for incline or decline angles TRU TARGET technology that allows you to switch between First Target and Distant Target modes Rainproof (IPx4)