Perfect for use on the golf range, out in the field, or on a lake, theBushnell Yardage Pro 600 Laser Rangefinder is a lightweight andcompact 4x monocular that accurately measures distances from 21 to 600yards away. The rangefinder is made of durable black plastic with arubberized gripping area, making it easy to hold. To measure adistance, simply put one eye up to the monocular, aim at a target,press and release the fire button on top of the instrument, and waitfor the reading to be displayed inside on the LCD. Your target must beat least 21 yards away or you will get no reading.

There are five different targeting modes easily set by pressing a modebutton also located on top of the rangefinder. The five modes are: 1)standard, for normal conditions; 2) scan, for moving targets; 3)reflective, for highly reflective targets; 4) rain, for readingsduring inclement weather; and 5) zip thru, exclusively for targetsmore than 115 yards away. Most of the time you will probably just wantto use the standard setting.

Infrared energy pulses are emitted from the Yardage Pro 600 when thefire button is pressed. A high-speed clock measures the time it takesthe energy pulses to travel from the rangefinder to the target andback. Using this information, sophisticated circuitry inside the unitinstantaneously calculates the distance to the target. The infraredenergy pulses are eye safe. The color, surface finish, size and shapeof the target all effect reflectivity and range. Brighter colors likered or shinier surfaces on targets allow for a greater range. Lightingconditions and angle to the target can also effect the range.

The Yardage Pro 600 can be set to measure distances in yards ormeters. The internal display gives you the distance measurement,indicates when the battery is low, and even rates the quality orreflective level of the target, which helps you decide whetherto switch targeting modes. It uses a 9-volt alkaline battery (notincluded). A sporty, form-fitting neoprene case with a shoulder strapis included in the box.