Argus 1431 MK2s White Phosphor Gen2+ system built NNVT tubes. These are fixed gain systems and offer a exceptional value for a entry level WP goggle. Every unit has super clean cosmetics and are built with Mil-Spec Carson lenses. 3 year warranty and Free Shipping!
https://nightsolutions.ca/blogs/news/nnvt-vs-photonis-echo-at-a-glance