The Bushnell 4 x 20 Medalist Golfing Laser Rangefinder is an advanced premium laser rangefinder comprised of Digital Technology allowing range readings from 5-1000 yards / 5-914 meters. Measuring 1.7 x 4.5 x 3.8 inches, the 9-ounce Medalist delivers superb and accurate range performance to +/- one yard. The Medalist features PinSeeker technology, SCAN Mode, 4x Magnification and Multi-Coated Optics for enhanced viewing. 

The Medalist emits invisible, eye safe, infrared energy pulses. The Medalist's advanced Digital microprocessor and ASIC chip (Application-Specific Integrated Circuit) results in instantaneous and accurate readings every time. Sophisticated digital technology instantaneously calculates distances by measuring the time it takes for each pulse to travel from the rangefinder, to the target and back. The ranging accuracy of the Medalist is plus or minus one yard / meter under most circumstances. 

The maximum range of the instrument depends on the reflectivity of the target. The maximum distance for most objects is 500 yards / 457 meters while for highly reflective objects the maximum is 1000 yards / 914 meters. The color, surface finish, size and shape of the target all affect reflectivity and range. The brighter the color, longer is the range. Red is highly reflective, for example and allows longer ranges than the color black, which is the least reflective color.