Wizzgoos Golf Laser Range Finder # 1 GOLFERS CHOICE. FDA APPROVED EYE SAFETY & FCC CERTIFIED GOLF RANGE FINDER (It has a Time of Flight Technology for accurate measurement.) Make your golfing more exciting with the most accurate device thatll aid you to reach the goal. Now you can practice and play with peace of mind that you are being assisted by the best device in the market right now. Materials & Specifications Range:600 Meter Accuracy:¹ 0.5 Laser Type:905 NM Eye Safety:FDA CFR 21 View of the Field:7° Objective Lens Diameter:22mm Magnification:6X Eye Piece Diameter: 16mm Diopter:¹ 5D Diopter Adjustment Method:Eyepiece Adjustment Operating Temperature:0° 40° C Display:LCD Size:110*65*38mm Weight Without Battery:164grams Modes:Golf Slope Mode, Flagpole Lock, Distance Measurement & Constant Measurement