This little piece of heaven is a must have if you don’t have to wear a hard hat in your shop! Cheaper then the 3m or high end Miller and still works great. I used it for a solid 8 months and could be welding all day and barely break a sweat, but now I have to wear a hard hat so I can’t use it. It will work with any Miller helmet (currently on a digital elite. Most other helmets with basic head gear will work as well. These are around 400 new but I also have an extra battery which is 100 new and some extra filters. I’m looking for 300obo with everything you need.