The LR4000A1 is a high-precision 4000m laser rangefinder with 7X magnification, 905nm Class 1 laser and ±1m distance/±1° angle accuracy, covering 10-4000m distance and ±90° angle range. It features 3 core modes: horizontal distance, vertical height and two-point height, supporting single/continuous measurement (excluding two-point mode), with meter/yard unit switch and last-set memory. Boasting a 24mm objective lens, clear digital display and 2000mAh 18650 battery (auto-shutoff in 8s), it weighs 223g (battery-free) with 1019946mm compact size. Suitable for high/moderate/low reflectivity targets, it fits golf, hunting, construction and outdoor use. The full kit includes rangefinder, battery, cloth, manual, lanyard, bag and box, portable and ready to use.