The Stinger features fully multi-coated lenses and BK-7 prisms housed in a rugged exterior. It has a center focus knob with an independent right diopter to adjust maximum focusing flexibility for all types of vision. With its portable size, these binoculars are the perfect companion for sporting events, hiking and any other outdoor activities. The Stinger comes with a detachable wrist-strap, microfiber lens cloth, and protective pouch.