1. Durable and protective rubber-armored.
2. Lightweight ergonomic design comfortable to hold.
3. Fully multicoated glass lenses deliver the ultimate brightness and resolution.
4. Bak-4 prisms offer the clear bright and crisp images.
5. Long eye relief for eyeglasses wearers.
6. Smooth central focus knob for quick viewing.
7. Nitrogen filled and o-ring sealed for waterproof / fogproof.