All Nightfox binoculars operate by emitting infrared light which the highly sensitive digital camera in the binocular is able to pick and illuminate the image on screen at nighttime or in low-light conditions.
Apart from the Nightfox 119v, all Nightfox binoculars come with an IR filter lens cap:
This is used to filter the infrared light that is emitted from the binoculars allowing for a clearer image during the day, or in well-light conditions.
It is therefore crucial that when using Nightfox binoculars at night, or in low-light conditions, that this lens cap is removed, as illustrated here:
Another feature that is important to consider for achieving the best possible image at night or in low-light conditions is the IR brightness. To do this, repeatedly click the device’s “IR” button (located at the top of all Nighfox binocular devices) to move up the power levels (the lowest is 1, the highest is 7).