Audiovox - Generic NV400B Infrared Digital Night Vision Binoculars 2.0 LCD Goggles 850nm

Digital night-vision binoculars for low-light

The Audiovox NV400B is a digital infrared binocular designed for viewing in darkness. It uses an 850 nm infrared illuminator and a 2.0 inch LCD screen to produce a visible image. The unit suits hunters, campers and security personnel who need a handheld optic for night-time use. It is not intended for buyers who require magnification beyond the fixed optical range or for users who need a daylight-only spotting scope.

Behaviour during extended night-time sessions

The device draws power continuously while the infrared LED and LCD are active, so battery life determines the length of uninterrupted observation. Heat from the illuminator and display remains low enough for comfortable handheld use over typical watches. The fixed 2.0 inch screen does not scale brightness automatically, so users must adjust manually as ambient conditions change. It is not suited for operators who need all-night recording without external power.

Limits of the 850 nm infrared system

The 850 nm wavelength provides illumination that is faintly visible as a red glow to the human eye, which can reveal the observer’s position at close range. Effective range depends on target reflectivity and atmospheric conditions, not on a stated maximum distance. The digital sensor and LCD introduce a fixed refresh rate that may show motion blur on fast-moving subjects. The system cannot penetrate dense fog, heavy rain or solid obstacles.