You have to know the wind direction to avoid spooking game and Code Blue Smoke Detector provides perfect readings every time with the accuracy of a smoke cloud. Super light air currents are hard to detect and can end a hunt quickly, but Code Blue Smoke Detector’s odorless cloud is ultra sensitive and shows air movement hunters can’t feel. The highly reflective cloud is easy to see even in low visibility conditions which is prime time for game movement. Unlike heavy powders, Code Blue Smoke Detector floats freely in the air and doesn’t fall straight down. Simple to use, doesn’t clog and 100% accurate wind reading every time. 1 oz.