The JR Series are roof prism binoculars. These binoculars feature BAK-4 prisms and fully multi-coated optics for crisp, clear viewing. The binoculars are O-ring sealed and nitrogen purged making them waterproof and fogproof. Large focus wheel turns smoothly for precise focus adjustments. Independent right diopter adjustment makes it possible to adjust the focus to allow for strength differences in each eye. The JR Series binoculars are the ideal choice for hunting, birding, hiking or fishing.