Moccasin Joe Smoke Low Light wind checker covers a full range of light and air movement conditions. They are Scent and Odor Free and can be used to detect the slightest of air movement. The Low Light is perfect for those dusk or early morning situation where it is hard to see. Just shake the bottle to mix the powder and air, flip the spout, squeeze and watch the smoke. Great for hunting, fishing, golfing and other sports.