***** **********Best Quality Guranteed. *****Marine Binoculars with Rangefinder and CompassInternal range finder scale and compass for distance measurement and direction testing. By specifying calculator dial on left eyepiece, the distance or size of objects are calculable. Rangefinder and compass scale are illuminated by light on/off switch under dark environment for more obvious reading. *****IPX7 Waterproof FloatingPressurized dry nitrogen-filled waterproof and fog proof design. Waterproof level up to IPX7 and float-able. Ideal companion tool for marine navigation, long-distance hunting, mounting hiking, nature adventure, wildlife observation. *****Double Focusing SystemDual focusing wheel on either eyepiece, easy to adjust; Interpupillary distance 56-72mm, exit pupil diameter 6.8 mm, FOV 7.5 /132M/1000M/396Ft/1000Yds, exceptional wide field of view; make it easy to operate for birders naturalists wildlife observers of all ability level with high durability anti-skidding rubber armor pr