If you are looking on Amazon at night vision goggles you might come across three similar and popular brands: GTHUNDER, HEXEUM, and JSTOON; and wonder what the difference is. Well, as far as we can tell there isn’t any. Same product under different brand names. We think they’re pretty good for the entry level price range but for our money we would pick the Nightfox Corsac. If you want a step up, check out the Nightfox Vulpex which upgrades the Corsac to 6x magnification, 220 yard range, and adds in an built-in rangefinder.