The H2O Binoculars are the ultimate on-the-water viewing companions. IPX7 Waterproof construction - tested submersion at 1 M for 30 minutes. Fully multi-coated optical system. BAK-4 Prisms enhance contrast resolution and light transmission. Non-slip soft touch rubber and easy grip texture. Comfort aluminum chassis adds durability and keeps lightweight. 10x Magnification with 42mm Objective lens. Field of view: 305ft. Exit pupil: 4mm. Close focus: 12ft. Twist-up eye cups. 20-Year manufacturer Ironclad warranty.