WHAT DOES NIGHT VISION BINOCULAR MEAN?

For night time viewing, the binocular has Just about the most effective infrared illuminators I've ever found with a binocular. In small lighting, I'm able to watch objects as far away as 250 yardsEra 4 binos will be the most powerful. They outshine each of the prior models with regards to effectiveness in small light-weight eventualities. And perh