The Ranger Eye 800 is an advanced laser range finding system that rapidly provides an accurately measured distance out to 800 yards.RE800 is an advanced compact yet simple-to-operate optical device that combines a 6x monocular with a laser distance-measuring instrument - Laser Rangefinder. It is intended to observe and measure distance of a specific (non-transparent) object. RE800 is equipped with an eye-safety laser. RE800 features four different modes of operation as well as an automatic shut-off switch.Optically the RE800 is a 6X25 monocular with a built in LCD in the field of view. When activated the LCD will display a viewfinder for aiming and other relevant data for adjustments and readout output data.RE800 can take measurements up to and beyond 800 yards; most users will find it most useful and accurate for readings within 600 yards.RE800 can be used for a wide range of sport activities such as hunting golf archery and target shooting as well as for industrial topography safety and tactical applications.Effective range 15-800 yardsTolerance +/- 1 yardIndicating time 15 sMagnification 6xObjective dia. 24 mmField of View 7 deg.Power supply DC3Weight 180 g