Suitable for both night and day vision, the 4x50 Equinox Z Digital Night Vision Binocular from Bushnell features a digital night vision sensor that is completely resistant to bright light and has an unlimited lifetime. The right objective aperture is dedicated to provide a single optical path for a bi-ocular viewing, while the left objective aperture houses a built-in infrared illuminator. The optics offer a notable 4x magnification that will keep image jitter low when you use this NVD as a handheld device. The 50mm objective allows your bi-ocular device to collect more light than an average device, which will further increase the brightness of your images and videos. If the ambient infrared from the moon and the stars doesn't provide enough illumination, you can use a built-in infrared light to ensure your target's visibility. With a variable output power, the infrared light source should add sufficient brightens to your targets. To offer versatility, the bi-ocular also has adjustable digital coarse focus and a video output.