X-Vision Optics RFO1600 Rangefinder is made for every outdoor enthusiast. Its high precision capabilities will give you confidence whether you're in the tree stand or on the golf course or verifying the person next to you is 6 feet away. Features multiple modes Standard, Rain, Golf, Hunting; red OLED display; Angle measurement range: 90 degrees; Range Accuracy +/-1 degree; Effective Lens Diameter: 0.67" and a battery life of 2,000 measurements.