The Bone Collector 1000 gives you fast and accurate ranges out to 1000 yards with 1 yard accuracy. The display shows you line of sight distances as well as ARC (angle range compensation) distances so you know your true distance at high or low shooting angles. Perfect for bow and rifle hunters who just need accurate distances quickly. The Bone Collector 1000 also comes with scan mode for quick ranges (4X a second), all glass optical system for up to 2X brighter image in low light, ergonomic design that fits comfortably in your hand.