I already had a weed burner that I was using as a lighter but this thing is something else, the old one you just adjust the regulator after you light it. this one has a rotary needle valve that you adjust like any other propane torch, but when you squeeze the lever for the first time it was quite a surprise. Full pressure or close to it from the tank, kind of like having a jet engine in your hand, a very loud roaring sound and people at the campground come running over to see what the hell is making the noise. The manual says up to 500,000 btu's and 3,500 degrees. Gets a wood fire going like now.