Apex XP binoculars with integrated rangefinding capability delivers both vibrant images rich in detail even in low light conditions through a combination of high-resolution ED (extra-low dispersion) glass that enhances luminosity and contrast with the help of superior BaK4 prisms. Unique PXA phase coating and HR metallic coatings make it easy to determine the precise distance between you and your target. Each rugged Apex XP binocular is waterproof for all-weather performance and purged with nitrogen gas to create an internal environment that is impervious to foggingFeatures :Integral RangerfinderHD High definitionED Extra low dispersion optical systemPXA phase coating for superior resolution and color fidelityHR metallic prism coating for enhanced light transmission and brightnessWaterproofFog-proofBAK4 OpticsLightweight