The J31s is an upgraded version of the original J31, which earned a name for itself as a reliable, cost-effective night vision binocular. The new model keeps that same affordability but steps things up with a larger F1.2 lens, pulling in more light for a noticeably brighter and clearer image.
It also features an anti-reflective coating on the optics to cut down glare and improve contrast—making it easier to spot detail in low light. If you liked the J31, the J31s is everything it was, just better.
