The M830r Laser Rangefinder 1535nm ranges farther for targeting accuracy. It calculates target distance from 50 meters to beyond 6 000 meters using a wavelength invisible to your adversary’s night vision devices. Features Sports-Auto Focus System lets you focus each eyepiece to your vision once then keeps images razor sharp from 20 yards to infinity Floating Prism System uses flexible silicon lens mount to absorb every shock impact and abuse without damage; Ergonomic Design shifts the center of gravity into the palms for comfortable long-time observation; fog proof clarity in any condition from artic cold to desert heat; NBR Rubber Armoring is durable slip-proof and noiseless to ensure secure chassis-protecting grip in all conditions and Makrolon housing is durable polycarbonate with NBR Long Life rubber armoring creating a lightweight rugged chassis that withstands 11 Gs of impact. Impervious to harsh conditions for generations of trusted use. Includes case cleaning cloth neck strap objective cover rain guard and shoulder strap.