Features: Magnification x Objective: 8 x 25mm. BaK-4 prisms for bright, clear, crisp viewing. Multi-coated optics for excellent light transmission. 100 percent waterproof - O-ring sealed and nitrogen purged. Non-slip rubber armor absorbs shock while providing a firm grip. 100% waterproof, O-ring sealed and nitrogen purged for reliable, fog-free performance.