One Yard Accuracy? Absolutely! No way with a GPS! Tree "canopy"? No Problem - With a GPS-Forget it! Flag moved? A GPS could be off by 10-15 yards and you will not even know it! You'll know it immediately with our Laser Rangefinders! What's the distance is to a hazard that is not on your GPS? No Way! With Opti-Logic Laser Rangefinders you know the distance to any spot! SPECIFICATIONS Min Range: 4 yards Max Range: 1200 Yards yards (to a reflector) 800 yards (reflector-less) (mode 1) exceeds 250 yards to a flag Repeatability & Resolution:+/- 1 yard/meter Precision: +/- 1 yard/meter Size: 1.5"x4"x5" Weight: Less than 11oz. Warranty: 2 Years Supplied with: Durable Carrying Case and Battery