Fangrui Product Details 1. 5-600p Handheld Golf Laser Distance Measuring Instrument Telescope Range Finder Distance Measurer, 600m 2. Features: 3. 5-600m (656 Yards) Measuring Range 4. Ensures You Would Be Out Of Range Of The Target, Which Is The Device That Golfers Use To Determine The Distance To Fixed Points Such As To The Flag, Green Or A Hazard. 5. Adjustable Eyepiece 6. By Adjusting The Focusing Dioptre Within A Range (-5+5), People With Far Sighted Vision Can Use Laser Rangefinder Without Glasses 7. Maximum Accuracy 8. 6x Magnification Within 1 Yard To Eliminate Unnecessary Guesswork Of The Distances. 9. Practical Lanyard 10. Prevents Falling Off During Measurements, Easy To Carry And Convenient To Record. 11. Wide Applications 12. Besides Golfing, You Can Also Use It In Camping, Hunting And Even In Construction. 13. Specification: 14. Laser Type: 905nm 15. Measuring Range Of Speed: 0 - 300kmh 16. Magnification: 6x 17. Eye Piece Size: 16mm 18. Exit Pupil Size: 3.8mm 19. Range Measurement Precision: Average +- 1m 20. Speed Measurement Precision: +- 5kmh 21. Operating Temperature: - 10 - 40 Deg.c 22. Waterproof: Ip54 23. Battery: 2 X Aaa Batteries (not Included), 1.5v, Alkaline, 0.75wh