Bresser rangefinder

The device shown is a Bresser 4x21 Rangefinder 800. It is used to measure distances up to 800 yards using a laser. Additional details: Magnification: 4x Objective lens: 21mm Measurement range: Up to 800 yards (730 meters) Accuracy: ±1 yard Features: Multi-coated optics Waterproof Compact and lightweight Non-slip rubber armoring Displays results in yards or meters Power: 9V battery (included) Includes: Carry case, lanyard, and lens cloth Common uses: Hiking, hunting, outdoor activities, and golf